The principle of communication devices such as mobile phones is to transmit signals to the phone through wireless electromagnetic waves based on the base station, so that the phone signal can be connected to the base station signal. Each radio wave in the signal frequency band has a different operating frequency band, and the mobile signal blocker blocks it according to the frequency band used by different electronic devices. When using these signal blocking instruments, the device emits stronger garbled signals in the radio frequency band, causing the signal emitted by the mobile phone to be blocked by half way interference, and the base station cannot receive the signal, thus successfully interfering with the mobile phone signal.

Sometimes it is quite convenient to use signal blocking devices. Currently, there are more and more places where mobile signal blocking devices are used, such as prisons, schools, examination centers, military forces, offices, conference rooms, factories, etc., which can be used normally in bustling cities and other areas, and the effect is also very good. Install signal shielding instruments to control their operating power within an appropriate range and only block mobile phone signals in the required area.
You can regularly check the working status of the mobile phone signal blocker to avoid malfunctions due to its age, and you can also return to the factory for maintenance to avoid potential risks. With the rapid development of the Internet, these signal shielding instruments are also being upgraded. Now, the function of shielding 5G signals has been comprehensively upgraded, and the effect has also improved significantly.