ViewTV 4 Port Amplifier/Splitter - Improves Signal for TV Antenna, Cable TV, HDTV and Helps with Dropped Internet Connection for Internet Modems. 1 Input Port and 4 Output Ports. Hookup 4 TV's with only 1 antenna! Splits signal and amplifies it at the same time. Will reduce video pixelation and graininess due to low signal levels. Also improves cable modem performance in many cases. Compatible with all cable TV systems as well.