http://123fbi.com/products/63-Handheld-mobile-phone-Satellite-signal-WIFI-truncator-SPY-121A-8-PRO.html

 

The mobile phone signal jammer is mainly used for places where all kinds of examination rooms, schools, gas stations, churches, courts, libraries, conference centers (rooms), theaters, hospitals, government, finance, prisons, public security, and military sites prohibit the use of mobile phones.

 

It is understood that the mobile phone signal masker on the market can limit the mobile phone signal from 500 meters away from the launch pad and has a radius of >20 meters. The shield radius is adjustable, it only shields the mobile phone signal without affecting other electronic devices. Save energy, power 20W - 480w.

 

When the mobile phone is working, it is within a certain frequency range, the mobile phone and the base station are connected through radio waves, and the data and the sound are transmitted with a certain baud rate and modulation. For this communication principle, the mobile phone signal masker scans from the low-end frequency of the forward channel to the high-end at a certain speed during the work process. The mobile phone shows the search network, no signal, no service system and other phenomena.

 

Common mobile phone signal jammers on the market, the role of its frequency: 869 ~ 894MHz; 825 ~ 960MHz; 1805 ~ 1880MHz and 1900 ~ 1990MHz and so on. The frequency bands are CDMA800, GSM900, DCS1800, PCS1900, and WCDMA. It can control the range of about 40 meters in diameter, using DC-DC converter input voltage, 5V output voltage.

 

Applicable place

 

1. Protection of border operators’ communication signals

2. Army combat needs

3. Detention Centers, Correctional Service Teams, Large and Medium-sized Prisons

4, large gathering place

5. Leaders visit security

6, college entrance examination, adult college entrance examination, self-study exam and various colleges and universities

7, Party and government agencies, various types of large and medium-sized conference rooms, concert halls, and theaters

8. Inflammable and explosive places such as gas stations, oil depots, oil fields and gas filling stations