8-Port Bi-Directional Cable TV HDTV Amplifier Splitter Signal Booster Enhanced version of B000WDR94U. Supports cable based E911 features. 4dB boost per port, doubles signal strength, reduces snow, prevents pixelation with digital cable. BYPASS feature allows critical cable equipment to get signal in the event of a power outage or amplifier failure. Compatible with all standard and digital Cable TV services, including the "Triple Play" phone service. 5-year warranty when purchased from an Authorized PCT Distributor/Dealer. Warranty not valid when purchased through other outlets.