Maximize device connection with the Rocketfish Bidirectional Mini Drop Amplifier. This mini amplifier connects up to 4 devices to the coaxial connection from your cable or indoor/outdoor VHF/UHF/FM antenna. It works with the DC power provided by components or with the AC power provided by the included adapter. It works with cable TV and cable modems but not with satellite boxes. This amplifier boosts incoming cable signals and has a 2 -way frequency range of 5-43MHz and 54-1000MHz to prevent signal loss. The LED indicator light on the amplifier lights up when AC power is in use. Rocketfish makes cutting-edge products designed to maximize the performance of your home theater gear. With TV wall mounts, HDMI cables, surge protectors, subwoofer receiver kits, optical cables, audio accessories and other home theater equipment, Rocketfish has all your home sound system needs covered.