In regular classrooms, when students secretly use their phones to read novels, make phone calls, send messages, and other phenomena, schools always need to find ways to prevent them. At the same time, frequency interference machines have gradually become a favorite among schools, and currently more and more schools choose to install this product, which seems to play a very important role.

As a very common cheating electronic device, mobile phones can easily obtain the desired answers from the Internet of Things. This small and easy to hide electronic device gives invigilators a headache. It is still easy for frequency interference machines to disrupt mobile phone signals. Once the device is turned on, the phone cannot receive any signals, and individual students cannot cheat online through their phones. Some schools use these shielding devices during exams to prevent students from cheating, reducing the waste of human resources to a certain extent.

Based on the distance between the on-site base stations, the strength of the on-site environmental signal is measured, and the size of the shielded on-site space is added to facilitate appropriate installation and use. This frequency jammer emits signals similar to base stations, covering the signals transmitted by the mobile phone, thereby disrupting the connection between the phone and the base station. Its power is likely to exceed the usual signal strength, thus achieving the desired shielding effect. The current interference shielding equipment has been applied in many places and has responded well, becoming one of the indispensable equipment for exams.