topsignaljammer's blog

In this era of information explosion, enterprises, institutions and government agencies face two major challenges when holding meetings: mobile phone interference and information leakage. Frequent incoming call prompts and information vibrations during the meeting not only interrupt the rhythm of the meeting, but also may bring unpredictable information security risks. In order to effectively respond to these challenges, we have launched a professional cell phone signal blockers - [Conference Worry-free Signal Shielding], aiming to provide customers with a safer and more focused conference environment.

Our service features

1. All-round signal shielding

The shielding equipment we provide covers all network frequency bands of China Mobile, China Unicom, China Telecom and China Broadcasting and Television, covering 2G, 3G, 4G, 5G and WiFi signals. This means that no matter what network the participants use, they can ensure that they are not affected by external signals during the meeting and protect the security and privacy of the meeting information.

2. Intelligent control and precise management

By using advanced signal shielding technology, we can flexibly adjust the shielding range and intensity according to the actual needs of customers, accurately control the shielding area, thereby avoiding unnecessary interference, while ensuring the privacy and stability of the internal environment of the meeting.

3. Fast and convenient deployment

Our signal shielding equipment is compact and easy to operate. It can be quickly installed in various conference venues, from small conference rooms to large conference centers. Once set up, the device will immediately start the shielding function to meet the needs of meetings of different sizes and specific requirements.

4. Low radiation, green and environmentally friendly

Using advanced digital intelligent shielding technology, our products can accurately match frequency points according to different wireless signal standards for shielding, while ensuring efficiency while reducing energy consumption, and achieve true low-radiation "green shielding".

5. Professional team, full-service

With an experienced and skilled professional team, we provide one-stop full-process services from initial consultation to subsequent maintenance to ensure that problems encountered by users throughout the use process can be quickly responded to and properly handled.

Applicable scenarios

Senior management meetings: ensure the confidentiality of sensitive information and eliminate external interference.

Project seminars: improve meeting efficiency and create an interference-free communication platform.

Business negotiations: reduce the risk of eavesdropping and protect trade secrets.

Large press conferences: prevent the media and participants from illegally recording and taking photos, and ensure the security of event information.

Our commitment

Safety and compliance: follow national laws and regulations, adopt the most cutting-edge technical means to ensure the safety and legality of operations.

Stable and reliable: all equipment has passed strict quality inspection and certification procedures, and can maintain stable performance even in complex environments.

Personalized customization: provide personalized solutions based on the unique needs of customers, and achieve the best shielding effect in the most economical way.

1. Introduction to the principles of mobile communication: The working principle of mobile phones is as follows: within a certain frequency range, mobile phones and base stations are connected through radio waves, and data and sound transmission are completed with a certain baud rate and modulation method.

2. Introduction to the principle of cell phone signal jammer Based on the above communication principle, the signal jammer scans from the low-end frequency of the forward channel to the high-end at a certain speed during the working process. This scanning speed can cause garbled interference in the message signals received by the mobile phone. The mobile phone cannot detect normal data sent from the base station, making it impossible for the mobile phone to establish a connection with the base station. Mobile phones show symptoms such as searching the network, no signal, and no service system.

3. Basic functions: 1. Effectively shields CDMA, GSM, PHS and other mobile phones. 2. Only shields mobile phone signals and does not affect the normal operation of other electronic devices. 3. Slow start design, it can work stably for a long time when the power is turned on.

1. Select the area where the mobile phone signal needs to be cut off, and place the cutter on the table or wall in this area.

2. After the installation is completed, turn on the power of the disconnector and turn on the power switch.

3. After the equipment is connected, press the power switch disconnector to start working. At this time, all powered mobile phones on site are in the search network state and lose the base station signal. Neither the calling party nor the called party can establish a call connection.

2. Introduction to the principles of mobile communication:

The working principle of mobile phones is as follows: within a certain frequency range, mobile phones and base stations are connected through radio waves, and data and sound transmission are completed with a certain baud rate and modulation method.

3. Introduction to the principle of mobile phone signal jammer

Based on the above communication principle, the jammer scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during the working process. This scanning speed can cause garbled interference in the message signals received by the mobile phone. The mobile phone cannot detect normal data sent from the base station, making it impossible for the mobile phone to establish a connection with the base station. Mobile phones show symptoms such as searching the network, no signal, and no service system.

In response to the continuous development of communication standards, the third generation 3G mobile phone signal jammer has been carefully developed based on the actual situation of foreign mobile communications. The difference between this jammer and ordinary mobile phone signal jammers is that it can not only shield ordinary mobile phone signals, but also must completely cover the three frequency bands of three domestic mobile communication operators. The 3G frequency bands used by China's three domestic mobile communication operators, China Mobile, China Unicom and China Telecom, are as follows: China Mobile 3G frequency band (2010-2025MHz), China Telecom 3G frequency band (2110-2125MHz), China Unicom 3G frequency band (2130-2130-2125MHz). 2145MHz).

1. Select the area where the mobile phone signal needs to be cut off, and place the cutter on the table or wall in this area.

2. After the installation is completed, turn on the power of the disconnector and turn on the power switch.

3. After the equipment is connected, press the power switch disconnector to start working. At this time, all powered mobile phones on site are in the search network state and lose the base station signal. Neither the calling party nor the called party can establish a call connection.

The portable mobile phone signal jammer adopts imported IC and is independently developed, especially for small venues at home and abroad that require special security and confidentiality, such as confidential offices, negotiation rooms, mobile vehicles, and mobile political and business circles.

It is a high-tech product carefully developed based on the actual situation of mobile communications at home and abroad for VIPs to guard the scene. It can block GSM/CDMA/DCS/PHS/ within a radius of 0.5-15 meters (usually about 5-80 square meters). PCS/3G mobile phone signals (enhancement can block GPS signals), making it impossible for mobile phones in the area to make and receive calls, and will not interfere with the work of other electronic equipment in the environment. When the phone is away from the shielding range, it can resume normal use.

The machine is easy to carry and concealed, small in size, light in weight, only weighing 150 grams; easy to operate, low power consumption, only 0.5W/h, and can be used for up to 2-3 hours when turned on; easy to charge, most Nokia chargers It can be used universally; it is a truly green and environmentally friendly handheld jammer.

1. Slow start function

After the shield is powered on, the working power rises from zero to stable within 4 seconds.

2. Shielding function

After activation is completed, mobile phones within the range will be blocked within 35 seconds.

Basic performance:

Transmission frequency range: 860-960MHZ 1.800-1.990GHZ

Transmitting power: 1W±200mA

Ambient temperature: -20—+55℃

Relative humidity: 30-95%

Functional frequency bands: CDMA800, GSM900, DCS1800, PCS1900, PHS.

Control range: about 40 meters.

1. Select the area where the mobile phone signal needs to be cut off, and place the cutter on the table or wall in this area.

2. After the installation is completed, turn on the power of the disconnector and turn on the power switch.

3. After the equipment is connected, press the power switch disconnector to start working. At this time, all powered mobile phones on site are in the search network state and lose the base station signal. Neither the calling party nor the called party can establish a call connection.

There are many kinds of examinations in society at present, and the most influential one is the annual college entrance examination. This is the door for thousands of students to enter institutions of higher learning and the bridge for countless families to place unlimited hopes on. There are also entrance exams for master's and doctoral students, CET-4 and CET-6, high school entrance exams for primary school to junior high school, etc. It plays a very important role in the life of every family. In order to fully ensure that all candidates are at the starting line of a "fair competition", relevant parties have adopted many methods, one of the most important measures is to resolutely put an end to cheating.

In order to take the examination style and discipline seriously and resolutely put an end to cheating, I think it is very necessary to use necessary technical means in the examination in a timely manner. Especially in view of the current serious phenomenon of cheating in mobile phone communications, the use of equipment such as cell phone signal jammers is a very effective measure. , in order to prevent cheating through the communication of internal and external information during the examination process. By using technical means such as mobile phone signal jammers and "mandatory" restrictions on cheating in exams for a certain period of time, we can gradually achieve a complete change in concepts, cultivate and improve people's awareness of integrity. When the social credit system is imperfect and bad social trends still exist, the only way to establish a credit system is to make full use of technological means to gradually establish a truly fair competition environment.

However, people have some misunderstandings about mobile phone signal jammer products. As a long-term worker in the education industry and an in-depth researcher of this product, I have the obligation to give a brief introduction to this product from a technical point of view. Public clarification.

The working principle of the mobile phone signal jammer (also known as mobile phone signal screen blocker, mobile phone signal jammer) is as follows: the scanning signal generated by the sawtooth wave signal generator is inverted by the inverter and then enters the voltage controlled oscillator to modulate CDMA, On the three frequency bands with the same downlink frequency of GSM and PHS, the modulated frequency sweep signal is amplified by the power amplifier, and the power of the power amplifier is controlled through the voltage regulator tube to make the transmission power less than 1W. The amplified frequency sweep signal is in the form of radio waves. Launch into the air. Because the frequency sweep signal causes garbled interference in the message signal received by the mobile phone, the mobile phone cannot receive normal data sent by the base station, making it impossible for the mobile phone to establish a normal connection with the base station. Thus, the mobile phone is separated from the base station communication network. The mobile phone shows the phenomenon of no signal and no service system in the search network to achieve the blocking effect. It does not rely on unlimited power increase to compete with the mobile phone base station to achieve the blocking effect.

The intensity of the electromagnetic signal emitted by the mobile phone signal jammer is very weak. As long as the electromagnetic radiation intensity is a qualified product produced by a regular manufacturer, its electromagnetic radiation intensity has been strictly tested by an authoritative testing and certification agency, such as the "Environmental and Health Related Product Safety Institute of the Chinese Center for Disease Control and Prevention". The electromagnetic field intensity measurement values at all sampling points are lower than the relevant frequency band standard limits of the "Electromagnetic Radiation Protection Regulations" (GB8702-88) formulated by the State Environmental Protection Administration (this standard is only 1/5 of the European standard and 1/10 of the Japanese standard). It will not cause harm to the human body, so there is no need to panic. The unnecessary psychological burden is the real obstacle. The power of mobile phone signal jammer is very small (≤1W), and its range is only twenty or thirty meters. It will not cause interference to mobile phone base stations at all, and when used in specific situations, it will not endanger public information security. The frequency of the electromagnetic signal it emits completely falls within the specified mobile phone operating frequency band, and this signal is always in a relatively static and constant state. It will not affect any other electronic equipment, nor will it interfere with the human brain or affect the human brain. normal human thinking.

GPS locators have become undeniably solid products, whether pinpointing a business property or monitoring a home. But as users become increasingly dependent on these things, the reasons for hackers to twist the system increase. Obviously, potential interference with how these devices work could severely impair performance.

GS monitoring device is mainly used for real-time location monitoring, monitoring of property and loved ones. For years, surveillance devices have been used for legal tasks such as rescue missions, sex offender monitoring, parole offender monitoring, and more. In addition to this, it can be used to locate and protect the team. The device helps team managers protect vehicles, ensure quick recovery if property is stolen, and ensure the company receives lower insurance premiums. In fact, these surveillance devices are used to check the whereabouts of spouses for potential inappropriate behavior.

For these reasons, people certainly need GPS locators to ensure that their devices are always working. Ironically, however, GPS monitoring devices can also compromise personal safety as much as they cause it. GPS signal jamming can also be helpful if terrorists can obtain important location information of government property or even if a wife can catch her as a defective husband.

GPS signal jammers and other signal restraint devices

Different methods of mixing or interrupting GPS signals will also depend on the type of monitoring equipment used. The most direct way to avoid being tracked is to destroy the GPS device and ensure that it cannot be resurrected. However, if the intention is to covertly tamper with it without the installer's knowledge, then it is simple to impede or impair a tracking device's transmission by using these instruments:

1. Metal shield

This is the cheaper option. Just wrap the tracking device with any metal covering such as copper mesh or lead camera film protector. The thieves are said to have used refrigerated trucks to transport vehicles equipped with GPS tracking devices to avoid being tracked.

2.GPS jammer

GPS jammers are mainly sold online. Plugged into the 12v adapter in the car, now the GPS radio signal can be damaged within a certain range.

3. Cell phone signal jammer

GPS jammers are mainly sold online. Plug the 12v adapter into the car and now the GPS radio signal can be destroyed within a certain range.

4.GPS camouflage

This is illegal and considered a risky trivial matter because it provides a false radio signal rather than the real data transmitted by the GPS device. This is especially harmful to business users.

People's communication methods have become more and more simple and efficient after the emergence of mobile phones, but at the same time, it has also brought great inconvenience to work in some places. Therefore, many places need to use signal jammers to block mobile phone signals to avoid normal Work is interrupted by mobile phones. So, what are the good properties that a signal jammer should have in order to achieve ideal results?

1. Weather resistance

In some places, signal jammers need to be used all year round. Therefore, the new signal jammer should have good weather resistance, be able to withstand the need for continuous operation all year round in harsh environments, and be waterproof, moisture-proof, corrosion-proof, pollution-proof, and lightning-proof. If it is used outdoors, it should also have the ability to work in the field.

2. Heat dissipation

The signal jammer will generate heat when working, especially when the temperature is high in summer and it needs to operate 24 hours a day, the heat generated will be higher. If the signal jammer has strong heat dissipation ability, it can effectively dissipate the heat generated by work to prevent the shield from being unable to function normally due to excessive temperature.

3. Stability

Only a signal jammer with good stability can achieve 24-hour uninterrupted operation and maintain efficient signal shielding at all times. Therefore, the signal jammer should adopt a modular structure and have the function of protecting the antenna, feeder, etc. from open circuit, short circuit, and damage. High-power equipment should also pass the destructive short circuit arc test to ensure stable system operation and future upgrades.

Whether it is weather resistance, heat dissipation, or stability, these are some of the properties that a good brand signal jammer for cell phone should have. In addition, the signal jammer should also have good safety performance, such as overload, short circuit, lightning strike, overload, etc. It must have voltage protection and self-recovery capabilities, and there must not be any device outside it that can change the operating status or operating parameters of the system to ensure stable operation.

In this Internet age, everyone has their own mobile phones and other communication devices, which brings a lot of convenience to everyone's life. However, in some special areas, mobile phones and other communication devices have brought a lot of troubles to people, such as: conference rooms, examination rooms, schools, dormitories and other areas, all of which have encountered similar problems. At this time, we can use signal shielding instruments, which can effectively block and interfere with the signals of mobile phones and other communication devices, and help special areas solve such problems. So do you really understand what signal shielding instruments are? Let's take a look at the main problems of common signal shielding instruments.

1. What is a signal shielding instrument

The signal shielding instrument uses a mobile phone to receive mobile signals sent by a base station, which interferes with the communication device of the mobile phone signal and the communication base station. These equipment research and development designs are mainly used in conference rooms, examination rooms, schools, dormitories and other areas where mobile signals need to be shielded. After starting, they can deal with threats that affect information security such as mobile phone signals, electromagnetic signals, and base station signals.

2. How does the signal shielding instrument work?

The signal shielding instrument can effectively interfere with the radio frequency in the area, blocking the mobile phone from receiving information, and thus interfere with all communications in the area. The wireless signal is actually like a noise-cancelling bubble. The user's phone will directly lose the ability to send and receive calls or text messages as long as he is within the range of the signal jammer for cell phone. The ability to receive calls or text messages will be restored after leaving the shielding signal range.

3. So why use a signal jammer?

Proponents of this technology believe that signal jammers are necessary when we cannot follow the generally accepted correct mobile phone standards. Think about the conference room, examination room, school, dormitory, or other quiet train. Most conversations, text messages, and streaming media can be destructive or even terrible.

Remember that signal jammers will not only block the audio and text on your phone, but also interfere with GPS, radar detection, and police equipment radar detection, which may cause more serious problems. For this reason, the US federal government prohibits the sale and promotion of signal jammers in the US market. So if you want to bring some peace and quiet with a shiny new signal jammer, you may just have to settle for headphones.

4. How should the jammer be tested?

You guessed it, the most common symptom of a signal jammer is service interruption. While some apps claim to detect jammers, most of them are unverified and require a working signal to work. Without any advanced military technology, it is virtually impossible for the average user to detect jammers on their phone.

5. How to prevent noise interference?

Blocking jammers is not an effective method unless you can actually find the jammer itself (usually looks like a walkie-talkie, cell phone, or wireless landline) and disable it.

Assuming you are technically proficient and can switch the power of your phone, you can also try jammers. But it does rely on the jammer to block complex signals.

If you suspect you will be the victim of a jammer attack, get away. Jammers usually have a range of no more than 300 square meters, so moving away from your current location is usually enough to avoid it.

When the mobile phone is working, it is within a certain operating frequency range. The mobile phone and the communication base station are connected using electromagnetic waves, and information and sound effects are transmitted with a certain serial port baud rate and deployment method. For this type of communication principle, the signal jammer for cell phone passes from the low-end rate of the wireless channel to the high-end scanner at a certain rate during the operation process. This scanner speed can cause errors in the packet format signals received by the mobile phone. The mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone mainly performs search network. Poor signal, no service system, etc.

Currently, the commonly used signal jammers on the market have effective frequencies: 869~894MHz; 825~960MHz; 1805~1880MHz and 1900~1990MHz, etc. The functional frequency range is CDMA800.GSM900.DCS1800.PCS1900. It can operate an area of ​​40 meters in diameter, using DC-DCSPWM to input working voltage and 5V output voltage.

How to operate

1. Select an area where the mobile phone signal needs to be disconnected and place the disconnector on the table or wall in this area.

2. After installation, connect the disconnector switch power supply and turn on the main power switch.

3． After the equipment is connected, press and hold the main power switch disconnector to start working. At this time, all the mobile phones that were turned on on the spot were in the network search state and lost the base station signal. Callers cannot create voice call contacts.

Are signal jammers harmful to the body?

The occurrence of "signal blocker" has a certain inhibitory effect on the increasingly serious "mobile phone noise pollution". But as a mobile communication technology affects equipment, whether the electromagnetic radiation caused by it will cause harm to human health has also become a question At the same time, in the installation and use process of mobile phone shielding equipment, there is still great subjectivity and randomness in the installation quantity, signal strength, covering method, radiation source control and other fields. In order to maximize the benefits of effective impact and shielding effects, venues even blindly follow the trend and introduce the use of powerful mobile phone impact shielding installation equipment. The interference and harm caused to the human body can only make people worry.

As another product of ours, the "signal jammer", while covering up mobile phone signals and ensuring data security, will undoubtedly have certain adverse effects. However, when we look at the problem, we should see the basic contradiction. Just like we don’t use a fruit knife because it will scratch our hands when cutting potatoes into shreds, we don’t reject a “cell phone signal jammer” because it may cause harmful radiation to the body. ". After all, the "mobile phone jammer" ensures network information security and contributes to social stability, which is its specific contribution. The most important thing is that it provides reliable guarantee for places with relatively high security performance, such as cells, detention centers, major conferences, etc.

As far as mobile phone signal shielding systems that meet the quality standards are concerned, judging based on the current level of understanding, there will be no security risks.

There are many occasions around us where the use of mobile phones is prohibited, such as examination rooms, offices, classrooms, factories, meetings, etc. In addition to handing over personal mobile phones to the security department for management in advance, signal blockers can also be used in these places. Mobile phone signals, Wi-Fi signals, and other network signals in special occasions can be effectively blocked. In this way, after there is no signal from the base station, everyone will not play with their mobile phones, so that the expected goals can be effectively achieved. The emergence of mobile phones has provided a very good communication tool for the general public, shortened the distance between people, and brought great convenience to everyone's life. However, with the increasing popularity of mobile phones, basically everyone has their own mobile phones, and mobile phones have become the level that people do not leave their phones, but this has also brought great threats to many special venues. Therefore, the sales market of signal blockers has also emerged.

So, where can signal blockers be used? The most common places for signal blockers are some information confidentiality agencies, government agencies, colleges and universities, etc. You can check the content for details.

1. Fairness in various large, medium and small examinations is the basic principle of social development, and we have to face many examinations in life, from elementary school to junior high school, college entrance examination, to national-level examinations such as college entrance examinations and civil servant recruitment. In order to prevent students from cheating, signal blockers and other methods must be used in various large, medium and small examinations to block the data signals in the examination room, so as to achieve the requirement that mobile phones cannot communicate and go online, which can also effectively prevent students from cheating.

2. Party and government agencies, companies, party and government agencies, companies, etc. also have requirements for signal blockers. The frequency of meetings held by party and government agencies, companies, etc. is really high, and in order to allow participants to focus more on the meeting and learn the spirit of the meeting more deeply, they must prevent the use of mobile phones. When the leaders report their work, they turn on the signal blocker to block the mobile phone signal. The leaders are not disturbed when they speak, and the audience below can also understand the specific needs of the leaders.

3. Some areas that need to be strictly controlled, such as defense areas, prisons, detention centers, etc., and some areas with very high confidentiality levels, should be strictly supervised for mobile phones. In defense areas, prisons, detention centers and other areas, shielding mobile phone data signals can greatly prevent the possibility of leakage.

Therefore, in addition to the applicable occasions of the three major types of cell phone signal blockers described above, other areas such as gas stations, petrochemical plants, hospitals and outpatient clinics where calls are prohibited, assembling mobile phone signal blockers, the actual effect is very satisfactory. When using a mobile phone signal blocker, you can choose according to the applicable scenario. For larger occasions, you can use a signal blocker with a larger output power.

Within a certain frequency range, mobile phones and communication base stations are connected through electromagnetic waves, and information and sound effects are transmitted at a certain serial port baud rate and modulation method. During operation, the signal jammer should output low output power to the high-end scanner at a certain speed. This scanning speed can cause error code effects in the message format data signals received by the mobile phone. The mobile phone cannot detect the normal data transmitted from the communication base station, making it impossible for the mobile phone to establish a connection with the communication base station, thereby achieving the purpose of shielding the mobile phone data signal. The mobile phone mainly shows network search, poor signal, no service and other conditions.

As a new technology electronic device, smartphones are very popular in today's society and are the main trend of social development. For most young people, unscientific use of it has caused many problems, so why use mobile phones and why should they be banned? What to prevent? Cell phone signal jammers can be used to prevent these problems, and cell phone signal jammers will be used in the national key vocational qualification examinations. There is no doubt that mobile phones have already undergone earth-shaking changes in our daily lives. We can communicate with each other more easily using mobile phones. We can buy or sell goods using mobile phones. It’s almost certain that you can’t live without your mobile phone now. But sometimes, if you're with good friends, relatives, you're at church, if you're committed to homework, you don't have to be on the phone. Thus, cell phone blocker can now turn into an effective dedicated tool when the phone is banned. So how exactly can we apply cell phone blocker?

Schools ban the use of mobile phones

It is necessary to ban the use of mobile phones. What we may easily think of is classroom teaching. Because we are students one day, we give warning experience about banning the use of mobile phones. With the development trend of the times, more and more colleges and universities have installed mobile phone jammers. In class, students play with their mobile phones and read novels very seriously. The signal jammer will block the working signal of the mobile phone. In addition, everyone who has experienced important exams will see that it will also be open to the public during important exams to prevent students from using electronic devices such as mobile phones. Children use mobile phones as a tool to prepare for exams. To prevent cheating in exams, schools must use cell phone jammers during exams.

cell

Prisons are criminal areas, and there may be terrorists in them. Because they should be prohibited from communicating with the outside world, they should not be allowed to use mobile phones and other electronic products to communicate with the outside world to prevent them from causing harm to prison security. Therefore, cell phone jammers are used in cells. This can be avoided. To prevent secret communication between casual offenders and visitors, cell phone jammers come to help.

main church

In Western churches, they are in a lofty place and should prohibit all uncivilized behavior. Ringing the bell will disrupt other people's behavior for a week, which is not civilized behavior. As a result, many cathedrals maintain a quiet atmosphere to preserve the spirit and install cell phone jammers to block data signals when necessary. Can you imagine answering the phone in a loud voice, rude and ignorant. As a result, affecting the frequency of mobile phones can be a good solution to the problem of playing deaf in Christian churches.

concert or theater

Imagine if you need to go to the theater for a play, and you like to have your cell phone ringing next to you, or calling out actions loudly, which will make you very angry, I think so. That's why the opera house has cell phone jammers. On the one hand, you can prevent the ringtone from disturbing the performers, and on the other hand, you can ensure that the audience has a faster experience. If you had a Ring Theater near an exciting concert or a great movie, everyone would be pissed. If you think it shouldn't happen in such an area, you can use a cell phone blocker.

court

The court is a place that protects the interests of the people and ensures that the trial process proceeds smoothly without any outside influence. As the court is a solemn place, it should not be disturbed by phone calls. Therefore cell phone signal blockers for sale should be applied in court to ensure authority.

your quiet years

If you have a lot of noisy phone calls, or you want to calm down while running or doing your favorite things, a cell phone jammer will help you deactivate your phone and ensure that no one will disturb your calls. All in all, no matter where you are Wherever you feel that your cell phone should not be used, a cell phone jammer can be a solution. Of course, the prerequisite is that it does not violate regulations and does not affect others.

Technology is developing more and more rapidly. With the continuous emergence of high-tech products, eavesdropping devices are also being updated in large quantities, and various eavesdropping devices have also appeared. . In addition, with the development of AI voice technology, your voice can be recorded invisibly. At present, your reputation can be quickly copied in about 5 seconds. Who would have thought that it would counterfeit the content of your conversation to do a page of illegal things?

Turning a smartphone into an instant eavesdropping device, for many smartphone users, there is actually a zero-cost eavesdropping device built into the phone. In the "Settings" button of the smartphone, the smartphone is turned into a microphone and the captured sound is transmitted using Bluetooth. The privacy Bluetooth transmission function was originally prepared for friends with English hearing impairments, but from another perspective, it may be used as an eavesdropper by bad guys. The application of the privacy function is relatively simple and can be completed in 2 processes.

1. Enter the "Monitoring Center" in "Settings", find [Hearing System] in "Custom Control", and import it into the Monitoring Center.

2. Then connect the wireless Bluetooth headset to the iPhone; pull up to open the [Hearing System], and turn on [Real-time Listening]. At this moment, if you want to put the phone in the eavesdropping position, you can leave the surveillance. But with the privacy function, you can't go far, and the longest distance is only 15 meters. In other words, you can't hear it beyond 15 meters, and you can't record it. Therefore, if you see someone put the phone in your position, you can get a heart. The hidden eavesdropping tool in the movie and TV "Eavesdropping" Louis Koo used an unknown lighter to eavesdrop on key intelligence information. This special tool has been integrated into reality.

In a case published on the Judgment Documents Network in 2017, a small mobile phone headset was mentioned, which was very small and basically difficult for the human eye to detect. But he can answer calls, record, cheat, gamble, etc.

Zhang and Xu have a shop in Huaqiangbei, Shenzhen. One of them is responsible for production and processing, and the other is responsible for sales. It has to be admitted that the courage is really big to sell contraband items in an offline mall system with such a large flow of customers. In fact, for professional voyeur eavesdroppers, car remote controls, clothing buttons, lighters, pens, watches, and any daily necessities you can think of can be made into eavesdropping and voyeuristic tools.

A reporter secretly visited and found that there are some stores on Taobao that exaggerate and look like serious video recording equipment, but the reviews are "very good, you can hear the voices of the next door." Once you go online to find out, you will be reminded to add WeChat private chat and trade these eavesdropping products. Why are they so "nervous"? The answer is easy. Selling such tools is a violation of the criminal law. The sellers of the above-mentioned cases have all been imprisoned. But under the temptation of profit, they are still taking risks.

Huang He, the CEO of the signal jammer, personally admitted that he owed wages and was ready to take his sister-in-law away. When you confidently took the eavesdropping pen and wanted to sue to get your salary back, you found that the eavesdropping device was full of noise?

These problems do not have to be attributed to the fault of the eavesdropping pen. There is another possibility - the signal jammer for phone. For most people, the signal jammer may still be very unfamiliar, and many people may not know it at all. However, in business meetings, information confidentiality conferences, military negotiations and other information confidentiality scenarios, signal jammers have long been widely used. The most common signal jammer is to use "ultrasound" to prevent eavesdropping.

Ultrasound is a sound wave frequency that is transmitted at a frequency that the human ear cannot recognize. It has no harmful effect on human health, but it will cause a huge impact on every machine that uses a pickup microphone to record sound. For example, for some animals that are sensitive to low-frequency sounds, ultrasound is fatal, such as mice, snakes, mosquitoes and other animals. This is also a basic principle of ultrasonic electronic mosquito coils.