In recent years, signal shielding equipment has appeared in school classrooms, churches, conference rooms and other places for many times, becoming one of the indispensable instruments. In fact, the essence of the cell phone signal jammer is to shield the mobile phone communication wireless network from signal interference, so that the mobile phone can not access the Internet, can not receive the signals from the mobile network, and can not send signals through the network, so as to achieve the effect of network disconnection. In the modern informatization, science and technology are also progressing gradually. Mobile phones have derived many new functions and replaced most electronic devices, making people's life more convenient. Nowadays, the functions of mobile phones are becoming more and more powerful. Many people are using the convenience of mobile phones to do some very bad things.

As a product that can completely eliminate the use of mobile phones, cell phone signal jammers often wander around the examination room. So why can a small device make a mobile phone disconnected from the network? That is because mobile phones are supported by wireless signals when transmitting or receiving information with the outside world. If not, mobile phones are naturally unable to receive or send information. The cell phone signal jammer can just shield this wireless signal, making the mobile phone present a signal free state within the working range of the shielding equipment.