This is a digital TV antenna with built-in amplifier. Receiving Frequency Range: VHF-H 170 ~ 230MHZ, UHF 470 ~ 860MHZ ANT power supplied internally (ANT-350) Power Consumption: DC 5V ?10%, 35ma max. (ANT-350) V.S.W.R: < 3 Power Gain: > 28dBm Operation Temperature: -20癈 ~ 70癈 Coaxial cable: L=4.2M DAT-200, indoor