The SatKing SK-910 is a high quality fully shielded in-line amplifier for digital TV signal amplification. This amplifier has an adjustable gain control the get the signal level right. This one amp suits most installations using VHF or UHF only or both. The gain on both VHF & UHF is 10-30dB, this also suits most installations both metro and regional. Also being powered by DC power means the noise level is very low, great for fringe area’s. This amp requires 12VDC power on the “input side”, use the SKU-9237 power injector the power this amp.