For TVs without AV jacks, this RF modulator helps adapt older TVs to VCRs, DVD players, camcorders and ... an S-video For TVs without AV jacks, this RF modulator helps adapt older TVs to VCRs, DVD players, camcorders and ... more. Features an S-video input.Product Features: 1.Channel 21 to 69 UHF Opertion(471MHz to 855MHz); 2.System ... Level1.5V(Max) Power SourceAC220V RF 207 AUDIO VIDEO RF MODULATOR