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.