This amp provides 4 ports for multiple TV sets, cable boxes, or cable modems * It boosts signal strength by +12dB, Improves Analog, Digital & HDTV Picture Quality, and Improves UHF/VHF/FM Antenna Reception! * The Active Return Path boosts broadband communications back to the cable company a feature for supporting interactive services. * High quality SCTE compliant connectors with patented DSM seizure technology provide better surface contact. * Meets all applicable IEEE surge standards for all output ports, which enhances system reliability.