Signalbox 900MHz 68dB Gain Cell Phone Signal Booster Repeater Amplifier with Antennas Frequency Range: 890-915MHz/935-960MHz Standard Supported : 2G GSM EGSM GPRS 3G Max. Gain (dB) : 68dB I/O Port : N-female on both ends Power Supply : Input AC 90-260V, Output DC 12V/ 2.5A