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The jammer scans from the low-end frequency to the high-end frequency of the forward channel at a certain speed during operation.Proper storage of high-power handheld signal jammers is important. Do not turn off the cell phone jammer frequently during work. After get off work, turn off the power and keep it in a safe place. Do not place it near radio equipment so as not to affect the operation of the radio equipment.If you use it for a long time, be sure to unplug it and store it in a safe place without fire.Before using th... more