TII 212 Broadband Cable TV and Satellite Lightning Surge Protector 75 Ohm 5-1500MHz Protects expensive HDTV receivers, DVRs, cable modems, etc. from potentially damaging surges. Unique In-Line design is virtually transparent to all analog or digital signals from DC to 1GHz. Provides superior protection against high and low voltage transient surges. Protection element is designed to reset after each surge event, with a service life of up to 1500 surges. 5-year warranty when purchased from an Authorized TII Dealer. Warranty not valid when purchased through other outlets.