Signalbox 70dB 850MHz Cell Phone Signal Booster Repeater Amplifier with Outside and Inside Antennas Kit Color: Black Compatible Phone Manufacturer: All Phones Work on 850MH Compatible Carrier: All Carrier Work on 850MHz Support Network: 2G, 3G, GSM, WCDMA Frequency: 824--849MHz/869--894MHz Gain: 70dB Connector: N-female Power Requirements: Power Supply: AC 100-240V; DC 12V/2.0A