... Booster Repeater Amplifier 50dB, which can 3,000 sq. ft. coverage, with indoor&outdoor antenna! GSM 900 MHz Mobile Phone Signals ... :The Booster is particularly useful in zones with poor GSM coverage such as basements, car parks and tunnels. It can also ... -960 MHzUp-link Gain : 45 dBDown-link Gain : 50 dBIndoor coverage: 300 M2Power output: 17 dBmPass band ripple: <5dBOut of band ...