When the mobile phone works, it is 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 this communication principle, Wifi Bluetooth Cell Phone Blocker scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed during the operation. The mobile phone manifests as the phenomenon of searching the network, no signal, no service system, etc. Common cell phone jammer operating frequencies on the market: 869~894MHz; 825~960MHz; 1805~1890MHz and 1900~1990MHz, etc. The working frequency bands include CDMA800, GSM900, DCS1800, PCS1900, WCDMA, etc.
It can control a range of about 40 meters in diameter, using a DC-DC converter input voltage and 5V output voltage. After years of hard lobbying in the film industry, the French government has approved the installation of Wifi Bluetooth Cell Phone Blocker in cinemas, theaters and concert halls to protect audiences from Cell phone ringtones and phone conversations, and focus on watching the show. Mobile phone affects box office? This sophisticated device, made by the British company, can make it impossible for mobile phones to receive signals and make outgoing calls within a range of 30 meters, but the emergency call service remains open.
