A. Brief introduction of handset:
Working principle of handset: In certain frequency band, handset connetc the base station with radio wave, and transfer data and sound by certain band rate and modulation.

B. Brief introduction of mobile phones jammers:
The jammer scans the forward channel with the certain speed, from low frequency to high.This scanning will create the noise in the TX signal, result that the handset can not receive the signal fromthe BTS, and disconnect with the

C. Main function:
1.Can block ＣＤＭＡ，ＧＳＭ，ＰＨＳ,3G ect effectively
2.Only block mobile phone signal, have no influence to any other electronic device.
3.Delay startup design, after connect the power supply, can work stably for a long time.
Main performance Main performance of mobile phone jammer:
1. Working frequency: 869MHZ-894MHZ, 925MHZ-960MHZ, 1805MHZ-1880MHZ, 1900MHZ-1925MHZ, 2110MHZ-2170MHZ, can block mobile phone signals, PHS, CDMA, GSM, 3G etc.
2 .Jamming coverage: 0M-70M ( jamming coverage is influenced by the distance from the cellular station to the jammer.It is better to fix the jammer to the place whichi is father than 200 meters from the cellular station. )
3. The jammers do not block the uplink frequency of the base station,have no influence to the base station.
4. Take use of our customized IC, which consume litter power, the temperation of the main body is 10℃ lower than jammers from other company. And can live 2 times longer than other jammers.
5. Radiation of the jammers is much less than the mobile phone, the jammers are really environmental
protection product.Take lead of our colleages.

Main features of GSH mobile phone jammer

One:GSH technology company limited uses high efficiency component and integrated circuit, espacially uses special power stabilization IC. Our jammers have high efficiency, easy to install,and can work for a long time. They can live two times as long as usual jammers.

Two:Can block CDMA signal effectively. CDMA communication net technology is combined with spread , specturmmultiple access, beehive net, and the frequency domain, time domain, time domain and code field three dimensional signals cooperate together. Therefore, the signals are good at anti-jamming and anti-multipath fading.So even increase the transmitting power, it is impossible to enlarge the covering range to 10M. But we take use of most advanced IC which come from Japanese Renesas Technology Corportation, can settle the mattle effectively, and adopt power amplification technology and power stability technology, we take the lead in solving the difficult problem-jamming signals decay with time, to ensure the jamming signal is stable.

Three:Really envirment protection product. Our amplification IC is consistent with mobile phone IC, so their transmitting power is consistent with mobile phone's transmitting power. Our product is researched and developed for National Safety Authority, National Safety Authority requires high abour envirment protection product. Our products overcome many technical difficulties, decrease transmitting power, and ensure the electromagnetic radiation is far below national standard( 12uV per square metre), and increase the coveraging range to farther than 20M. Has no harm to human being, are really envirment protection product.

Four: Our customized industrical power supply are hight temperature resistant and moisture resistant, can ensurethat the main body can work for a long time.

Five:Special Nec technology settlement, take the lead to settle the matter that mobile phone jammer signals decay with time, guarantee that the temperature of the main body is the times lower as other jammers, and can live two times as long as other jammers.

Main functions　Four channels can jammer CDMA, GSM, PHS etc effectively.Only jammer mobile phone singnals, has no influence to other electrical device.Can be used in any places farther than 200M from base station (thejamming coverage can be affected if the distance is not farther than 200M) After switch on, can work stably and continously for a long time.Special overvoltage protection, over current protection and short circuit proction circuit can prevent spark by mechanical switch.