TVGuardian: The Foul Language Filter The TVGuardian automatically filters profanity and other offensive phrases while you watch your favorite movies or television shows. Easily Connects Between a TV and VCR, Cable Box, Satellite Receiver, and most DVDs*. Strict and Tolerant Filter Settings - 95% accurate in muting profanity of closed-captioned sources. Three Closed-Caption Settings - Strict, Tolerant and Off. Limited One Year Manufactures Warranty