Viewsonics VSMA601C-10R 1-Port TV Signal Booster/Amplifier with Active Return Path (Retail Package with 5-Year Warranty) The VSMA-608c-10R has the EXCELLENT PERFORMANCE and is Recommended For Use With Cable Modems Amplifies your cable TV signal to dramatically reduce snow, graininess, digital pixilation and other picture problems. Not for satellite systems. Fully compatible with all advanced cable TV services including Digital Cable, HDTV, and CABLE MODEMS Included with purchase: Power Supply And Installation Instructions Retail Package comes with 5-year Warranty