Mobile Cellular Cell phone Signal 850MHz 55dB 3G CDMA Booster Repeater Amplifier In-building Use Type: Booster Color: White Compatible Phone Manufacturer: All Phone work on 850MHz Compatible Carrier: All Carrier work on 850MHz Coverage: 2500 sq ft Frequency: Frequency Range:824-849MHz,869-894MHz Gain: Max. Gain (dB) :55dB Connector: I/O Port : N-female on both ends