Examination is a way to test the level of knowledge. The examination can not only check the students' learning ability, but also understand their other skills. In order to ensure the fairness of the examination results, the examination room must have strict disciplinary measures, and specially install electronic jammers. It is absolutely prohibited to cheat on mobile devices. Otherwise, it will bear legal and criminal responsibilities. In order to protect the interests of the vast majority of candidates, necessary restrictive measures must be taken against the cheating of a small number of people. The examination management department has adopted the practice of installing electronic jammers. In the course of the examination, the examination room and the surrounding environment are shielded in all directions, and the mobile phone signal is blocked. Some parents of examinees are worried that this will affect their children's normal performance in the college entrance examination. In fact, the electronic jammer will not cause harm to the examinee and the examination staff, nor will it affect the normal answer of the examinee. When the electronic jammer is installed in the examination room, because there is a strong signal magnetic field around the host and antenna within a certain distance, the installation position of each component is very important. If the installation position is incorrect, the transmitted signal of the electronic jammer may be disturbed and the shielding effect may be affected.

The electronic jammer supports network control. When it needs to be used in one or more classrooms, it only needs to control the one or more electronic jammers through network transmission. When installed, it can be placed in different classrooms. The user can control all wireless signal shielding channels to open or designate to open an electronic jammer. If it needs to be closed, it only needs to send a closing instruction through the network.