Amplificator semnal GSM 900 / 2100 MHz

Here are the specifications of this device:

Specification:
1) Frequency range: Up link GSM 890-915
Downlink GSM 935-960
2) Gain(dB) GSM Up link: 55
3) GSM Downlink: 60
4) Gain adjustable range: MGC 30dB
5) Output power(dBm): 20
6) Pass band ripple GSM: 4dB
7) Guard band rejection: GSM(BW-60dB) 42 MHz (BW-70dB) 45 MHz
8) I/O impedance: 50/N Connector
9) I/O return loss: ?-10dB
10) Noise igure: ?-8dB
11) Intermodulation attenuation (Po=13dBm): ?40dBc
12) Transmission Delay: ?0.5us
13) Ambient temperature: -10~50
14) Power supply: AC110~220V±10% 45~55Hz
Characteristic:
1) Fully integrated 900 MHz antenna system
2) Powerful amplifier enables up to + 85 dB of signal gain including cable loss
3) Intelligent signal processing and real time adaptive operation
4) Automatically adjusts power levels as needed to ensure a consistent coverage footprint
5) Reprogrammable (in the field) enabling spectrum or carrier reconfigurations as needed
6) Auto-Track LED diagnostics displays aid install and operation
7) Patented algorithms and adaptive processing ensure our products will not interfere with other wireless frequencies or radio devices