At present, we can often see the emergence of signal jammers in schools. Up to now, it is not uncommon. On the contrary, it is used more and more. It is generally used before and after the classroom and when preparing for the exam. This device is not only simple to interfere with mobile phone signals, but also to provide candidates with a level playing field. The installation of signal jammer may lead to the absence of network signals in a certain area, and special attention should be paid when using it, but this does not affect the transmission of base station signals.

Mobile phones have affected everyone's lifestyle, but this may affect some students. Excessive use of mobile phones will not only affect their eyesight, but also may affect their studies. Since the signal jammer appeared, it has hit some students' use of mobile phones in school. It only interferes with mobile phone signals, and the use of other electronic devices and the signals sent by the base station are not affected. Many students now have mobile phones, lack self-control, indulge in games and novels, and cheat in exams using mobile phones. Many schools install it to control it.

Sending signals of the specified frequency band interferes with the mobile signals received by the mobile phone, so that the mobile phone cannot connect to the network, send and receive short messages through the mobile phone, making the original message unrecognizable, thus achieving the purpose of interference, which is the main working process of the signal jammer. Reasonable use can completely avoid interfering with the normal use of other electronic products, so there is no need to worry too much about such products.