Mobile phone signal jammer is a special equipment, its main goal is to be used in all kinds of places with strict restrictions on the use of mobile phones, including examination rooms, schools, gas stations, religious places (such as churches, courts, libraries), conference centers, theaters, hospitals, government agencies, financial institutions, prisons, public security and military areas.
Mobile phone signal shielding devices on the market have efficient shielding capabilities, which can limit the signal range from the transmitter to 500 meters away, and the radius of more than 20 meters. Its shielding range can be adjusted to interfere only with mobile phone signals and will not affect the normal operation of other electronic devices. The device is designed to be energy efficient and environmentally friendly, with power between 20W and 480W.
The transmission of mobile phone signals is through radio waves connected with the base station in a specific frequency range, transmitting data and sound at a specific baud rate and modulation. Cell phone signal blockers work by quickly scanning these frequencies, creating garbled interference, so that the phone cannot receive the normal signal of the base station, so that the connection cannot be established, and the user will see a search network, no signal or no service prompts.
Common cell phone signal blockers operate in several major frequency bands, such as 869~894MHz, 825~960MHz, 1805~1880MHz and 1900~1990MHz, covering communication standards such as CDMA800, GSM900, DCS1800, PCS1900 and WCDMA. They typically control an area of about 40 meters in diameter and use a DC-DC converter with an input voltage of 5V.
