Signalbox 900/1800MHz 3dBi Indoor Whip Antenna Work for Cellphone Signal Repeater Booster Color: Black Compatible Phone Manufacturer: All Phones Work on 900-1800MHz Compatible Carrier: All Carriers Work on 900-1800MHz Support Network: 3G GSM CDMA W-CDMA EGSM Gain: 3dBi Connector: N-male