perhaps you can buy a lojack signal jammer

In many cases, such as exams and conferences, using a mobile phone is very inappropriate, and wifi jammer can make mobile phones and Wi-Fi signals unavailable in certain areas. Without the telephone and Internet signals, we would not use the telephone and achieve the desired results. The development of mobile phones has reduced the distance between people and brought great convenience to everyone's life. However, with the popularity of mobile phones, it is a wearable product, which has brought disadvantages in many cases. Therefore, we have also developed mobile phone signal jammers.

The proliferation of mobile phones in libraries, schools, and other places has brought very serious mobile phone noise, affecting people's normal study and work. Using a cell phone at a gas station poses a risk of fire and explosion. wifi jammer can effectively solve these problems. The mobile phone cannot establish a connection with the base station. It does not interfere with other electronic devices. It has advanced features and is easy to install.We strictly adheres to the quality system, producing ideal and reliable safety products that can be continuously operated for a long time.

When the selection of cell phone jammers is a problem worthy of attention, wireless signal interception equipment is a device specifically designed to enter the test room. It uses a multi-band design to completely solve the problem of cheating. We have fundamentally solved the problem of signal instability. With this product, you don't have to worry about the adverse effects of mobile phone signals on the surrounding residents. With built-in antenna, some Lojack Signal Jammer products can also arrange the blocking area freely.Use of military jammers in prisons, public safety and other places where mobile phone use is prohibited.