Cell Phone Repeater Booster Amplifier GSM/3G Wide Band 850MHz full High Gain Antennas 75db 3G Signal Repeater Booster Amplifier Color: Black Compatible Phone Manufacturer: All Phone Work on 850MHz Compatible Carrier: All Carriers Work on 850MHz Frequency: 824-849MHz 869-894MHz Gain: 75dBi Connector: N-female Power Requirements: Power Supply: AC 100-240V; DC 12V/2.0A Dimension: 4.80 x 4.29 x 1.06 in