PCT 4-Port RF Signal Amplifer With Active Return This amp provides 4 ports for multiple TV sets, cable boxes, or cable modems It boosts signal strength by +7dB, 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.