As the mobile communication rapidly develops, the human being is striding forward towards the great goal of global seamless communication in any place at any time. However, when the cell phone jammer facilitates people?s daily life, it also causes many problems, such as interfering with others. For example, we will always be interfered with by the sudden cell phone bell in such quiet and serious locations as the meeting room, library, cinema, classroom, church, concert hall and so on.
Interference with operation of the equipment
The cell phone needs to transmit strong high-frequency electromagnetic wave to the outside during its working process. Definitely, it will interfere with the around sensitive electrical apparatus. Such locations as hospital, petrol station, and airport and so on are extremely sensitive to electromagnetic radiation of the cell phone.
Leaking
For our country has mastered the core technology of the cell phone, leaking accident of the cell phone happens at times. Even if the cell phone is turned off, it is still hard to avoid leaking completely. This kind of problems are extremely serious in such locations as the business meeting room of enterprise and institution, court, government office, secrecy bureau, public security bureau, financial organization, law advisory office, embassy, army and so on.
Cheating in the examination room
It is the usual phenomenon in the school examinations to use the cell phone to pass on the answer. For the body search is not convenient to implement, this phenomenon has become a big problem which bothers the examination organizer.
DM-1301 type of mobile phone jammer adopts the latest electronic interference technology. It can cut off connection between the wireless cell phone and mobile communication base station so that the cell phone can not make or answer calls in the specified range. And then purpose of shielding cell phone signal can be achieved and the above problems can be avoided. The cell phone jammer can block the following cell phone systems: GSM of China Mobile; GSM and CDMA of China Unicom; PHS of China Telecom.
Main functions of cell phone jammer: it can shield such wireless communication tools as GSM, CDMA cell phone and PHS.
Main characteristics of cell phone jammer: 1. the effective shielding rang is 10-30m (dependent on distance of the base station); 2. it is environmentally green and does no harm to human body; 3. it will not influence the cell phone signal outside the working range; 4. it is easy and convenient to install and it can be used after inserting the plug.
Applicable range of cell phone jammer: it is applicable to the meeting room, examination room, concert hall, cinema, library, court ad church and so on.
Performance indices of Cellular phone jammer: 1. shielding frequency: 869-894MHz(CDMA)?935-960MHz(GSM)?1805- 1880MHz(GSM)?1900-1920MHz(PHS); 2. shielding object: GSM and CDMA cell phone and PHS; 3. shielding radius: 10-30m (dependent on distance of the base station and indoor field strength); 4. output power: dual channels of 2W; 5. power supply voltage: AC 220V; 6. ambient temp.: 0?-55?
Package size of signal set: 290?280?80mm; package size of ten sets: 600?310?420mm
Source: http://www.lonad.com/2011/09/08/cell-phone-jammer-dm1301-2/
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