Winegard HDTV Antenna Preamplifiers are engineered to the highest specifications ensuring consistent and unmatched signal amplification performance. The AP-2870 is designed to couple and amplify separate UHF and VHF antennas together to overcome cable and splitter loss. It is constructed of tough ABS plastic for a long life in the elements. Included steel mounting hardware is zinc plated. The preamp features a selectable FM trap that reduces FM signals -15 dB to prevent overload from strong local stations and specialized, surface mount circuitry ensures the highest quality and reliability.