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