In recent years, mobile phones have developed rapidly and have become an essential and important communication tool in people's lives. However, in certain situations, mobile phones can cause trouble for people. For example, some people cheat on their mobile phones in exams, and leak secrets through their mobile phones in conference rooms... In order to solve these problems, some places have begun to use mobile phone jammers to shield Mobile phone signal, so as to ensure that everything is safe.

Mobile phone jammer is a device that shields Mobile phone signal through electromagnetic wave shielding. Its working principle is to emit electromagnetic waves of a certain frequency, which interfere with mobile phone signals, thereby preventing their normal reception and transmission. Mobile phone jammers usually use some special materials to block the propagation of electromagnetic waves to achieve the effect of shielding Mobile phone signal.
The use of mobile phone jammers can effectively prevent the transmission and reception of Mobile phone signal, thus preventing cheating and other improper behaviors. It can also avoid interference from factors such as mobile phone ringtones on the order of the exam room, ensuring that candidates focus on answering questions. This shielding device also has the advantages of simplicity, ease of use, and obvious effectiveness. The shielding device is suitable for various exam venues, such as the college entrance examination, Mandarin proficiency test, civil service exam, vocational qualification exam, etc. It is also suitable for important meetings, business negotiations, and other occasions to ensure the safety and order of meetings.