Crystal-clear, high-definition signals right out of the box! With virtually no assembly, this antenna is low-profile and seamlessly combines reliable, multi-directional UHF and Hi-VHF signal reception. No other antenna can match its performance in such a compact form. The 20 dB USB in-line amplifier system provides added range and maximum signal reception. You can connect the USB cable directly into the USB port on your TV, and the amplifier will only draw power when the TV is turned on, eliminating power consumption. If you don’t have a USB port on your TV, the kit includes a USB power adapter for use with any standard wall outlet. Ideal for indoor or outdoor use. Includes 20" mast, mounting hardware, adjustable mast clamp, 20 dB USB in-line amplifier, 5 ft. USB cable, and USB power adapter.