PCT 4 Port Cable TV/HDTV/Digital Amplifier Internet Modem Signal Booster Internet Amplifier With Power Supply and Coax Power Cable - PCT-MA2-4PN 4 ports with an increase of +7 db per port. Passive Return / 6 kV surge protection for lightning strikes. Gold-plated, berylluim copper construction, and powder coated housing deters corrosion Ultra small form factor for ease of installation in confined spaces Reduces snow and prevents image pixelation with digital cable. Coaxial cable INCLUDED Compatible With All Standard And Digital Cable TV Services, OTA Antenna And Satellite Services (When Using With A Satellite Received, Amplifer MUST Be Used On The Output Side Of The Receiver - NOT ON ANY LINE DIRECTLY CONNECTED TO THE DISH! 5-year warranty when purchased from an Authorized PCT/Channel Master Distributor/Dealer. Warranty NOT Valid When Purchased Through Other Outlets.