Communication equipment is also constantly updated. The rapid development of communication technology makes mobile phones more and more popular. Up to now, it can be said that there is only one person, and the communication mode has changed from the fixed and rigid location of landlines and telephone booths to the communication at any time and anywhere. At the same time, this has brought new challenges to social information security. The use of mobile phones to cheat in examinations, interfere with public order and plagiarize important information often occur. In the school, the examination should be fair and just, but every time there are always some people who take chances in the examination and use some despicable means, which seriously affects the order of the examination room and the fairness of the examination. However, using mobile phones to cheat often depends on signals. Whenever and wherever mobile phones send information, they always need signals. Signal jammers mainly cut off the flow of signals, making mobile phones unable to contact the outside world. For the phenomenon of cheating in exams, the use of signal jammers has always been very effective.

In the examination room, the size of the signal jammer is not very large, it does not occupy a large area, and the use of the jammer will hardly make a sound, will not interfere with the examination room environment, and will not affect the state of the students' examination. In addition, the signal jammer mainly interferes with the mobile phone signal, making it unable to communicate. There is no need to worry that the use of these jammers will affect the normal operation of other electronic equipment in the examination room. It is also very necessary to use these jamming devices reasonably to reduce troubles in peacetime.