Phonetone 900MHz GSM CDMA Cell Phone Repeater High Gain 75db Cellular Signal Booster with ALC AGC Automatic Gain Control Color: Black Compatible Phone Manufacturer: All Phone Work on 900MHz Compatible Carrier: All Carriers Work on 900MHz Frequency: 890-915MHz 935-960MHz 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