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Many customers hope that the 5G jammers they purchase has the function of penetrating walls. They even hope that the 5G signal jammer can directly penetrate the interference signal through two walls and still maintain sufficient strength. So, can such expectations be realized?

This requires distinguishing the material of the wall. If the interference signal of the 5G signal jammer encounters a reinforced concrete wall in the transmission path, the interference signal will be almost completely attenuated and reflected. Behind such a wall, the reception The interference signal received from the 5G signal jammer will be very weak, even close to 0. If it encounters a second wall, the interfering signal will be completely attenuated. For example: If there are no mobile phone signal amplifiers installed in the elevator shaft and underground parking lot of the building, there will be no mobile phone signal at all in these two places, because the outdoor mobile phone operator's base station signal cannot penetrate the steel bars at all. Concrete wall.

Let’s look at some other strong materials. If the interference signal of the 5G signal jammer is transmitted during the transmission process, it encounters walls made of wooden boards, or walls made of glass, ABS plastic, etc. These materials are not suitable for wireless signals. The attenuation effect of the 5G signal jammer is very limited. When the interference signal of the 5G signal jammer penetrates these materials, the signal strength error is very small. Even if there are two consecutive such walls, a strong interference signal can still be received.

Based on the above content, the issue of whether the interference signal of the 5G signal jammer can penetrate two walls has little to do with the 5G signal jammer itself, but should focus on the material properties of the wall.

The use of full-band signal jammers in school exams has become a trend, but there are many issues that need to be considered before use. For example, when the jammer is activated, the mobile phone will display a signal. Why is this?

First of all, we need to understand how the full-band signal jammer works. It can emit radio signals that conflict with the signals between mobile communication devices, causing the devices to not work properly. When the jammer is activated, the mobile phone will display a signal, which may be due to the following reasons:

When the signal is displayed on the mobile phone screen and a call is made, the mobile phone can be used normally and the call quality is relatively good, which means that the full-band signal jammer may not have achieved effective interference effect or the interference range is not large enough. In addition, if your mobile phone is close to the jammer but there is no signal, it means that the jammer used is not enough to meet the interference requirements on site, and you need to install some more high-power signal jammers.

Sometimes, the mobile phone shows that there is a signal, but the call quality is very poor, which means that the interference effect of the cell phone jammer on the mobile phone is in a critical state. There is a certain interference effect, but the interference range is unstable. This situation may be caused by the unstable signal strength from the base station signal to the site of use or some mobile phones with strong anti-interference.

When a mobile phone shows that it has a signal, but is actually unable to make calls or even access the Internet, it may be caused by a false signal. At this time, when making a call, the mobile phone will display no signal or restricted services. At this time, it can be judged that the signal displayed on the mobile phone is a false signal, but the actual mobile phone is blocked. At this time, the mobile phone cannot be used normally with the outside world.

It should be noted that the interference range of the full-band signal jammer is related to the strength of the mobile phone signal at the location of the user unit. If the mobile phone signal in the location where the unit is used is strong, the interference range of the device will be shortened; if the mobile phone signal is weak, the interference range of the jammer will be expanded.

In short, before using a full-band signal jammer, it is necessary to comprehensively consider the site, equipment and other conditions used to determine the best use plan to ensure that the interference effect achieves the expected effect. At the same time, interference from mobile phones also needs to be carefully considered to avoid affecting normal communication services and causing certain social impacts.

• Wide application areas

Cell phone jammers are mainly used in examination rooms, but are not limited to examination rooms. They can also be used in prisons, gas stations, oil depots, liquefied gas stations, detention centers, interrogation rooms, courts, labor reform teams, conference rooms, theaters, churches, libraries, and schools. It will only be used in dormitories, special security and confidentiality occasions (confidential offices, negotiation rooms, mobile vehicles, mobile political and business dignitaries guarding sites), etc.


• Strong pertinence

Cell phone signal jammer can mainly be used for domestic college entrance examinations, domestic postgraduate entrance examinations, adult college entrance examinations, self-study examinations and various college and university examinations, as well as various middle schools, technical secondary schools, vocational high schools, prisons, detention centers, conference rooms, etc. to use mobile phones to cheat, send random text messages, Negative effects caused by communication with persons outside prison and collusion in confessions.

• Diverse signals to be shielded

Effectively shield GSM/CDMA/DCS/PHS/TD-SCDMA/WCDMA/WIFI/TD-LTE/FDD-LTE.

• Model advantages

There are many names for 5G signal jammers, such as signal jammer, mobile phone shielding, signal interference, data signal influencer, data signal shielding, mobile communication technology signal interference, data signal shielding, cell phone signal jammer, signal shielding, and wireless communication signal shielding.

For the upper and lower security channels of the mobile phone system, technologies such as memory overclocking, frequency division, and frequency hopping filtering are used to analyze the necessary shielding frequency; a spherical shielding indoor space is formulated according to the signal shielding output power, and shielding will be automatically generated within the specified range. Electromagnetic fields make mobile phones ineffective in indoor spaces. When the signal shielding is in operation, the data signals sent and received by mobile phones within a specific range are invalid, which means that the phone cannot make calls and receive calls, thus achieving the purpose of forcibly prohibiting use.

The working principle of 5G signal jammer: Within a certain frequency range, mobile phones and communication base stations are connected to each other based on electromagnetic waves, and adopt a certain serial baud rate and configuration method to transmit data information and sound.

The shielding range of the 5G jammer is based on the output power of the signal jammer. During on-site testing, the high and low shielding ranges of signals in the local environment are different. For example, if the indoor signal has a weak shielding range and a large range, a GSM base station should be equipped outdoors, so the GSM signal is close to the outdoor shielding range.

The heat dissipation types of high-power cell phone signal jammers are divided into the following two types:

High-power cell phone signal jammers that use natural heat dissipation generally use fully sealed heat dissipation shells. The host is the shell, and the shell is the radiator. The switching power supply, radio frequency module and other components used by all devices are all integrated inside the device. The shell material is generally They are all aluminum and are die-cast with different molds. They are generally used in places with harsh external environments, such as places with a lot of sand and dust, or places that need to be equipped with explosion-proof boxes, such as gas stations, oil depots, hazardous chemicals warehouses, etc. Cell phone signal jammers that use this kind of heat dissipation shell generally require wide coverage, strong ability to adapt to harsh environments, and ensure the normal operation of the internal radio frequency module through natural heat dissipation.

There are many types of high-power cell phone signal jammers that use auxiliary fans to dissipate heat. The radiators used in this type of cell phone signal jammers are mainly aluminum profiles. After cutting, the chassis shell is installed, and the RF module and power light components are installed. Installed in the chassis. The heat dissipation is divided into two parts. One part is to extract the heat from inside the chassis and send the air from outside the chassis to the inside to form air convection and transport the heat to the external environment. The second part is to install the fan in the heat dissipation tooth area corresponding to the radiator module, and then the fan dissipates heat to the place that generates more heat to ensure the normal operation of the internal RF module.

The vast majority of common wireless signal jammers on the market are not with power adjustment, such as for the examination room signal shielding or for the venue signal shielding, but there will still be a part of the customer base, they are hoping that the shielding equipment has the function of power adjustment. Why is there such a demand? This is the customer does not want to interfere with the signal range is too large, thus affecting or interfering with other unrelated areas, then, with the power to adjust the wireless signal jammer, it is the overall adjustment or frequency band to adjust the transmit power?

Standing in the customer user's point of view to look at this issue, the customer is of course, hope that the wireless signal jammer power adjustment operation, can be simple, convenient and fast to achieve the purpose. For example, through a physical power adjustment knob can realize the output power size adjustment. However, the final result provided by the manufacturer is that such an adjustment function is actually difficult to realize. That is to say, a simple potentiometer knob is basically not feasible for overall power adjustment.

Why did we come to this conclusion? That is because the wireless signal jammer for a variety of frequency bands, standard signals, is divided according to the frequency band, by at least ten or more shielding modules. Each shielding module only for the current frequency band signal interference. We take cell phone signals as an example, different frequency bands, different systems of cell phone signals, even in the same location, it received from the base station signal strength, in fact, there are differences. The result of this difference is that the wireless signal jammer for different frequency bands, different systems of cell phone signals, the effective shielding distance there are differences, and sometimes the difference is also very large. If the use of just an adjustable potentiometer on the wireless signal jammer for the overall power adjustment is obviously not appropriate, the correct approach must be for the different frequency bands for individual adjustment. This is why we can see the situation is: where the wireless signal jammer with power adjustment function, its power adjustment knob number is very much, and the number of these adjustment knobs and shielding module is a one-to-one correspondence.

Finally, but also additional reminder: for a wireless signal jammer power adjustment, relatively speaking, is the effective shielding range can be accurately controlled, but if the user only rely on the power adjustment knob adjustment can only be done to achieve a general regulation, if you want to achieve a more accurate range control, we recommend that the manufacturer of the wireless signal jammer, carrying a professional wireless signal spectrum analyzer. If you want to achieve a more precise range control, we suggest that the manufacturer of the wireless signal jammer should carry a professional wireless signal spectrum analyzer with the help of the spectrum analyzer to display and analyze the power at the same time of adjusting the power level, so as to achieve the final ideal effect.

Mobile and Wireless Wi-Fi Network Jammer is designed to keep you safe and protect your private property space from unwanted phone conversations, eavesdropping on communication channels and information leaks on mobile internet channels, wireless Wi-Fi and Bluetooth networks with the help of Wireless cameras and bugs. Also, when using a jammer, the activity of most wireless devices will be blocked, 99% of which are devices that operate on the 2.4 GHz frequency.

Usually, such wifi jammers are used for forbidden or unwanted use of mobile phones and the Internet (in offices or conference rooms), as well as personal protection of confidential information (for example, in private apartments or houses). 2.4 ghz blocker generates radio interference in GSM 800/900/1800/1900 MHz, 2100Мгц3G, LTE-4G 800/2600 and frequency 2400 MHz bands with Wi-Fi / Bluetooth networks and most spy cameras and bugs. The jammer prohibits all connections and cannot transmit any information through any device using these frequency bands. The effective blocking range of WiFi and mobile phone signals is up to 20 meters, depending on the distance from the base station or other transmitting unit, the link you want to mute, the battery level, and even the material of the inner wall of the building or the movement you want to block device model.

Before first use, the antenna must be firmly attached to the appropriate connector on the 2.4 ghz signal jammer, and the battery fully charged for a few hours or connected to an outlet. The battery device can work automatically until 2 hours with a single charge, but it can work continuously if the suppressor is connected to the charger. Featuring a traditional dark exterior design with no extra buttons, sensors or indicators, this suppressor is extremely easy to operate. The jamming device is not heavy, so it can be used as a stationary device. You can customize it once and set it in any desired room. Sale, purchase and use of 2.4 ghz frequency jammers and cordless internet blockers for personal safety and on your private property without violating applicable laws. However, it is worth remembering that you do not have the right to prevent the use of services to third parties in public areas by means of signal interruption of any kind.

As the name suggests, it means shielding wireless signals. The English name of the jammer is JAMMER, which is usually called signal counter equipment and signal sealing control system in China.

Signal suppressor, signal blocker, signal masker, signal blocker, signal driver, etc. are called differently in each place, and the jammer is called according to function or

The use is divided into radio frequency signal jammer, mobile phone signal jammer, GPS Jammer, wifi signal jammer, UHF/VHF explosion-proof jammer, recording

Jammers, test room jammers, vehicle jammers and other wireless signal shielding categories.

main indicators:

Product model: JW-N8G 8-way handheld signal jammer

Shielding signal: full-frequency mobile phone signal 4G/3G/2G +WiFi2.4G/5.8G or GPS/Beidou navigation

Transmitting power: 0.7W per segment, total output power 5.6W (excluding antenna gain)

Shielding distance: 2-20 meters (subject to changes in signal strength or use environment)

Shielding angle: horizontal 360 º (the installation height is about 2 meters)

Indication function: charge and discharge, LED light indication of the working status of each channel

Battery life: Built-in large-capacity lithium battery works continuously for 1.5 hours, standby for 180 days, and fully charged for about 4 hours

Product size: 163x85x47 mm (excluding antenna length)

Host weight: about 0.5kg

Operating environment: -40°C/60°C

Packing details: jammer host x1, omnidirectional antenna x8, charger x1, DC12V car charging cable x1, nylon protective case x1

How to test the local signal strength before choosing a mobile phone jammer?

The interference effect of the signal jammer depends on the signal strength of the use environment. The shielding distance indicated by the manufacturer is usually based on the signal strength of -75dbm, so what type of jammer to choose, you need to know the local signal strength, otherwise there will be no effect or Not ideal situation. The stepped signal icon is just an icon displayed on the front end of the mobile phone system, and it deals with the "dBm" value. Chinese means milliwatt decibels, which is a unit of signal strength commonly used by mobile phones. dBm is calculated by logarithm, so the displayed dBm is negative.

Generally speaking, if the dBm value displayed by the mobile phone is between -80 and -50, then the signal is good, and you can talk and surf the Internet normally. If the value is below -90dbm, it is relatively low, and there may be a phenomenon of dropped calls during calls; if it is -100, it is recommended to turn on the airplane mode when sleeping at night, otherwise the power consumption and radiation will be large! Most Android phones can check the signal strength of the phone through [Settings]-[About Phone]-[Status]-SIM Card Information. How to check the iPhone?

Let's take the iPhone XS as an example. The user can enter the code "*3001#12345#*" in the dial interface, then click the dial button, and click the "Serving Cell Meas" interface in the opened interface to view "rsrp0" and "rsrp1" signal strength value of main card and secondary card.

Mobile phone communication is an open electronic communication system. It must complete the transmission task through communication satellites. As long as there is a corresponding receiving device, it can intercept any time, any place, and anyone's call information. Mobile phones can also leak secrets in standby mode, because in standby mode, mobile phones also maintain uninterrupted signal exchange with the communication network, generating electromagnetic spectrum, which is easy to be identified, monitored and tracked. Intelligence experts bluntly said that even if the user does not use the mobile phone, he can turn on the mobile phone by remote control through a simple phone password and eavesdrop on any conversation you have. Therefore, a full-band shielding device should be installed in secret-related places. The relevant state departments have made the following regulations on the use and management of mobile phones of party and government organs and their staff:

It is strictly forbidden to talk about state secrets while using a mobile phone.

It is strictly forbidden to use mobile phones to store and transmit state secret information.

Mobile phones are not allowed to be brought into venues involving secret state meetings, places where matters involving state secrets are discussed, or the central computer room of secret-related computer systems. If you bring your mobile phone into the above places for special reasons, you should take out the battery or take shielding measures.

In important meeting places, examination rooms or other secret-related places, a full-band shielding device should be used to shield mobile phone signals to prevent mobile phone leaks.

topsignaljammer Technology Co., Ltd. is a professional manufacturer of full-band signal blocker. Accumulated more than ten years of field experience in full-band shielding instrument. For meeting rooms in secret places, the recommended model is: SMa-818B5. This full-band shielding instrument has a built-in soft whip omnidirectional antenna, and the 12-channel RF module works independently, which is convenient for upgrading and replacement. The full-band shielding device can shield all 2G/3G/4G/5G/Bluetooth/WiFi signals. Effective shielding range: radius 0-30 meters (-75dBm, indoor transparent environment, depending on the distance of surrounding base stations)