Signalbox 65dB 850/1900MHz GSM CDMA Dual Band Cell Phone Signal Repeater Mobile Phone Signal Repeater with Omni-directional Antennas High Gain 1000 square meters(White Cable) Frequency Range: 65dB 850mhz(824-849MHz/869-894MHz)--1900mhz(1850-1910MHz/1930-1990MHz) Standard Supported : 2G/GSM CDMA 3G/WCDMA NOTICE: Please make choice before buying it. If you do not sure the Repeater's frequency you need, we can help you select a right one for you.we have all USA frequency amplifier .so feel free contact us please. REMINDER: This is a signal BOOSTER, not creator. If you have good service outside and poor service inside, this is the product for you. If you do not have service outside, this will do nothing for you. Power Supply : Input AC 90-260V, Output DC 12V/ 2.5A