Cell phone jammers block signals from base stations

Shields radio wave signals from mobile phones, compatible with 3G, 4G, CDMA, GSM, DCS, PHS, WIFI and GPS. It is compatible with mobile phones of all frequencies currently used in Japan. In this way, the trouble of using the mobile phone can be completely solved. Models that are already hard to stop are likely to get stuck. ◆ Move the terminal out of the service area, block the reception of the pass-through signal from the base station, and temporarily prohibit the equipment for outgoing and incoming calls. ◆ With the function of adjusting the intensity of radio wave interception, each antenna has independent power supply and radio wave adjustment buttons. Therefore, the customer can individually set the radio waves he/she wants to shield and the radio waves he/she does not want to shield.

Tested by relevant departments to produce cell phone signal jammer. High-power mobile phone signal interference electromagnetic field strength is also high, requiring a longer distance to enter the safe range. The effect of cell phone jammers in small spaces such as classrooms and conference rooms is easy to negotiate.

Mobile phone jammer background: various examination rooms, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, government, finance, prisons, public security, military and other occasions. Persons using mobile phones are prohibited from using mobile phones in the above-mentioned situations. But in the above occasions, if you are not careful, the mobile phone will be turned on and brought in. Therefore, there is an urgent need for a technology to shield mobile phones without affecting the use of other electronic products.

Cell phone signal jammers came into being. The principle of the mobile phone jammer is that within a certain frequency range, the mobile phone and the base station are connected by radio waves to complete the transmission of data and sound with a certain baud rate and modulation method. In view of the above communication principles, the mobile phone jammer scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during operation. This scanning speed will cause garbled interference in the message signal received by the mobile phone, and the mobile phone cannot detect the normal data sent by the base station, so that the mobile phone cannot establish a connection with the base station. The mobile phone manifests as the phenomenon of searching the network, no signal, no service system, etc. Ultimately, the phone has no signal and cannot receive text messages or calls.