Amplifier, Cable TV RF Broadband 8dB Gain Four Output 5-1002Mhz w/ Power Adapter Four port amplifier with a passive return path provides an increase of +7.5 db per port. Reduces snow and prevents image pixelation with digital cable, boosts antenna (OTA) signals for distribution to multiple TVs. May improve cable modem performance. May improve HDTV reception. Compatible With All Standard And Digital Cable TV Services, OTA Antenna Reception. Not compatible on systems with an existing amplifier or pre-amplifier. Exceeds all SCTE Standards. Coaxial cables are not included. 6 kV surge protection for protection against lightning strikes. The nickel plated housing provides the excellent corrosion resistant protection against salt fog and rust. 5 Year Warranty (amplifier only) 3 dB Noise Figure provides clean amplification of weak signals to overcome the poor noise figure in TV tuners and converters. 6 kV Combination Wave Surge Protection Unique surge protection on all ports. PTC Short-Circuit Protected UL Listed Adaptor - Self-resetting circuit protection provides safe protection against short-circuits to minimize outage times.