Vktech GSM980 Cell Mobile Phone Signal Amplifier Booster Repeater + Antenna A mobile phone signal repeater provides the ultimate solution in any area where cellular communications can not work well due to leak of signals Ideal for house, home, office use Frequency Range: Uplink 890-915MHz; Downlink 935-960MHz Gain: Uplink 58dB; Downlink 55dB Connector: F type female connector