Asunflower&reg; LCD GSM 900Mhz Mobile Cell phone Signal Booster cellular Repeater Amplifier Intelligent signal processing and real time adaptive operation Reprogrammable (in the field) enabling spectrum or carrier reconfigurations as needed Automatically adjusts power levels as needed to ensure a consistent coverage footprint Powerful amplifier enables up to + 85 dB of signal gain including cable loss Frequency range: Up link GSM 890-915 Mhz