Phonetone 55dB 1700MHz Mobile Phone Signal Booster Repeater Amplifier with Indoor Ceiling Antenna and Outdoor Omni Antenna Type: Booster Color: Black/White Coverage: 2500 sq ft Frequency: Frequency Range:1710-1755MHz,2110-2155MHz Gain: Max. Gain(dB):55dB Connector: I/O Port : N-female on both ends Power Requirements: Main Power :AC 100~240V / DC12V 2A