Make Your Own Wifi Cell Phone Jammer
The mobile phone will have no signal. This is because there is an electromagnetic wave transmitter in the area. Its frequency is the same as that of the mobile phone. The signal it emits interferes with the signal of the mobile phone. The Make Your Own Wifi Cell Phone Jammer currently on the market works according to the second method. In fact, the principle is very simple, but it is illegal to use this frequency band privately. cell phone jammer Can not generate commercial value, but now the school is starting to use it to prevent cheating.
During the test, the signals of all mobile phones, Bluetooth and WiFi devices shall be effectively shielded, and the shielding range shall be within the classroom of all test rooms and within 10 meters of the classroom. For this reason, when building standardized examination rooms, each examination room is equipped with a Make Your Own Wifi Cell Phone Jammer . During the construction, in order to avoid misoperation of turning on the equipment in the classroom, the power supply of the mobile phone signal jammer was designed for centralized control, unified lead, and unified switch. This switch is only turned on and used during national examinations, and it is usually turned off.