Telephone interference use and characteristic use: mobile cell phone jammer are only used for mobile phone communication without affecting other harmless electronic devices, so they can be widely used. Various conference rooms, auditoriums, courts, libraries, doctor offices, schools, theaters, hospitals; as well as gas stations, gas stations, oil fields, oil depots, government, military, financial, securities, prisons, public security command centers, or prohibited Use your mobile phone anywhere. Mobile phone jammer function The mobile phone signal interferes with all the latest SMD components and integrated circuits, advanced performance, and easy to install for a long time. The manufacturing process is an ideal and reliable security product, strictly in accordance with the stability and reliability, quality system, can protect the environment, ensure safe production, and enhance information security. The three main functions and technical indicators of the mobile phone jammer are the main features: 4-channel model effectively shields CDMA, GSM, DCS, PHS, mobile phone signals, others usually use within 200m distance, better shielding does not affect the normal operation of other electronic equipment The mask starts from the base station... Effective shielding radius: Provides a soft start on the 0 to 25 meters line to find the main specifications of the machine’s mechanical ignition switch, which can avoid the long-term stability of the circuit.