Military power, prisons, detention centers and other areas that require strict control are extremely sensitive, and mobile phones also need to be tightly controlled. In areas such as military powers, prisons, detention centers, etc., blocking cell phone signals can greatly reduce the possibility of leakage. In addition to the above three categories Cell Phone And Wifi Jammer Diy , it is also ideal to install mobile phone signal jammers in gas stations, oil depots, hospitals and other places where phone calls are prohibited. There is no good reason to use mobile phones during school hours. If there is an urgent need, there is always a phone call to all students in need on campus. All the mobile phones are used up in school. 99% of the time I send text messages to friends in another class, take pictures, and surf the Internet. I am "killing time" for teachers to teach through social networks. Only on campus are students encouraged to focus on school during class time. After leaving the affected premises after school, they can call again and provide services as needed. They leave school as soon as possible. Or, as a more convenient way, these cell phone signal jammers have an on/off switch. cell phone jammer
There are usually many types of mobile phone signal jammer devices, including handheld devices, wearable devices, and transmitters. The typical shielding range of Cell Phone And Wifi Jammer Diy devices on the market is 500 meters. The working principle of the mobile phone signal jammer: The mobile phone is successfully connected to the communication base station because the signals of several other frequency bands emitted by the mobile phone jammer search and interfere with the mobile phone communication signal, and it cannot succeed. To achieve the purpose of not being able to send and receive information, and not be able to communicate normally. In fact, the easiest way to block cell phone signals is to turn on the plane mode of the cell phone. The mobile phone flight mode is a convenient mobile phone signal mode introduced by the manufacturer to satisfy users when the mobile phone signal is not allowed.