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1mhz-12ghz wireless mobile phone 4g/3g/2g signal detector rf error detector + automatic search alarm + gps tracker finder with magnet led light 1. automatic search: if you want check if the room or car is safe, you can put it in a room or car, and then turn on auto search, it will search automatically, once received signal, the light bar will light up once, if received 6 times, the light bar will light up at 6 lights, and then it will sound an alarm to remind you that there is suspicious signal . the signal detector has a wide frequency (1mhz-12ghz): once there is a suspicious signal, you can use it to detect it find out its main features: professional radio waves detection device, high sensitivity, large frequency detection and detection.syi
