Signalbox Cell Phone Signal Booster Kit 4g Lte Amplifier Dual Band 850/1800Mhz 2g 3g Repeater Frequency Range : 824--849MHz/1710-1785MHz, 869--894MHz/1805-1880MHz Standard Supported : GSM 3G 850 1800MHz DCS Max. Gain (dB) : 70dB I/O Port : N-female on both ends Power Supply : Input AC 90-260V, Output DC 12V/ 2.5A