China cell phone jammer is the use of imported IC

Select the area cut off cell phone signals will be cut are placed in this area of the desktop or wall. After installation is complete, turn off power supply, turn the power switch. After the device is connected, press the power switch off device can work. At this point the phone at all on-site search on network status, loss of base station signals. Calls are not called to establish the primary contact. cell phone jammer only shield the cell phone in the examination room and will not influence the cell phone outside the examination room.
china cell phone jammer is the use of imported IC, independent research and development, especially for domestic security and confidentiality of some of the special needs of small market places, such as confidential office, negotiating room, the flow of vehicles, movement of political and business dignitaries and other security-site , according to the actual situation of domestic and foreign well-Mobile successfully developed high-tech products, it can 0.5-15 meters in radius (usually about 5-80 square meters) within the mobile phone signal blocking GSM/CDMA/DCS/PHS/PCS/3G (enhancement of the GPS signal can be shielded), so that the region can play and receive mobile phone, and will not interfere with other electronic equipment within the work environment. Away from the screen when the phone range, you can resume normal use. cell phone jammeronly shields the downlink frequency of base station and will not influence the uplink frequency of base station.

Easily concealed machine portable, small size, light weight, weighing only 150 grams; simple operation, low power consumption, only 0.5W / h, power usage time up to 2-3 hours; easy to charge, most of the Nokia chargers are may be common; is truly environment-friendly hand-held jammers. Communication standard for the continuous development of mobile communications based on actual situation of foreign well-developed third-generation 3G mobile phone signal jammers. The shielding device with the ordinary mobile phone signal jammers difference is, its not only the ordinary cell phone signal shielding, but also the need for three domestic mobile operators for the three-band completely covered. China's domestic three mobile operator China Mobile, China Unicom, China Telecom's 3G frequency band used is as follows: China Mobile 3G bands (2010-2025MHz), China Telecom's 3G bands (2110-2125MHz), China Unicom 3G bands (2130 - 2145MHz). More and more manufacturers lay emphasis on the profit of the cell phone and cell phone jammer market.
Principle mobile communications: mobile phone works as follows: at a certain frequency range, mobile phones and base stations connected via radio waves up to a certain baud rate and modulation for data and voice transmission. Cell phone signal jammers Principle for the communication theory, the shielding device in the course of their work to a certain speed past the lower end of the channel frequency to high-end scanning. The scanning speed can receive messages in the mobile phone signal interference in the formation of garbage, the phone can not detect normal data sent from the base station, the phone can not establish connection with the base station. Performance of mobile search network, no signal, no service system and so on. The manufacturer should pay much attention to the quality of cell phone and cell phone jammer.