The mobile phone signal jammer can only shield the mobile phone signal without affecting other electronic devices. The electromagnetic signal emitted by the mobile phone signal jammer is completely within the working frequency band of the mobile phone stipulated by the country, which will only block mobile communication. And this signal is always in a relatively static state and will not affect any electronic equipment.
The cell phone jammer scans from the low end frequency of the forward channel to the high end at a certain speed during operation. This scanning speed can cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone is manifested as the phenomenon of searching the network, mobile phone no signal, no service system and so on.
The current mobile phone signal jammers are all full frequency bands. It can shield all the 2G 3G 4G signals, 2.4G WIFI signals and Bluetooth signals under all the three operators of China Mobile, China Unicom and Telecom. Its principle is sent by itself. The frequency interferes with the mobile phone receiving the frequency sent by the base station and the wireless router, so as to achieve the purpose of shielding them.
Therefore, all electronic devices other than the above frequencies can work normally.
But if the frequency is too close to the frequency of the mobile phone signal jammer, it will also be interfered, such as a wireless microphone of about 700 or 800 megabytes. It is too close to the CDMA frequency (870-880MHz), and the wireless microphone cannot be used normally at this time.