Energy Supply: DC 6V 100mA by outside adapter or DC 5V from USB source. Simple operation, Fast and easy Setup, Just Plug it in. No tools are needed for installation. Check out what channels are available in your area first and how many you are able to receive. Channel reception is dependent upon distance from broadcast towers, terrain, surroundings, and weather. Works with any non-amplified / passive television antennas. If your TV picture is not crystal clear, or you cannot receive weak signals from far-away towers, use this amplifier to boost the weakened signals.