Signalbox 70dB 700MHz 4G LTE Cell Phone Signal Booster Repeater Amplifier Obly for AT&T Operator Frequency Range Downlink: 698--716MHz Frequency Range Uplink: 728--746MHz Frequency Range Uplink: 728--746MHz Max. Gain : 70dB Spending 4 g from the United States. But it has two 4 g spectrum in the United States. The product support AT&T 4G rather than Verison 4G. Please make choice before buying it. Power Supply : Input AC 90-260V, Output DC 12V/ 2.5A