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Mobile phone signal jammers have become standard equipment in the examination room.
Not only the high school and college entrance examinations, but also postgraduate exams, civil service exams and various qualification certificate exams, mobile phone signal jammers are needed to prevent candidates from communicating with the outside world through wireless signals.
It can shield all the 2G 3G 4G signals, 2.4G WIFI signals and Bluetooth signals under all the three operators of China Mobile, China Unicom and Telecom.
The communication principle of the mobile phone signal jammer, the jammer scans from the low end frequency of the forward channel to the high end at a certain speed during the working process.
The basic principle of mobile phone jamming equipment is to emit the same radio frequency signal as the mobile phone.
As long as there is a machine with the same frequency as the phone, when the base station tries to connect to the phone, it will make a lot of "noise".You will find that the signal from the phone is unrecognizable, so you will refuse to communicate with the phone.
