Mobile Telephone Signal Amplifier GSM&DCS 918

For modern, mobile phone, is one of important communication tools, but its signal is very weak even disappear completely in some cities and countries due to the complex landform especially the elevators, basements and underground channels.
Sanllon series mini mobile-phone signal amplifier is very effective to improve the mobile-phone receiving signal and eliminate communication dead corners and blind zones in the areas where the signal is weak, for instance hotel, underground parking lots, nightclubs. In order to meet different needs we apply several types including 300m², 500m², 1000m², 3000m² and more than 10000m² for you.
The amplifier operational principle:
Here amplifiers and antennas are bi-directional running. Open antennas send the signals to amplifiers form base stations, and then indoor aerials transmit the signals magnified by the amplifier. Similarly, indoor aerials can send indoor signal to amplifiers, and then the signal can be sent to base stations after being magnified by the amplifier. The amplifier innards is as follows.