For TVs without AV jacks, this RF modulator helps adapt older TVs to VCRs, DVD players, ... Carrier Output Level 66±3.5dBuV RF Output Channels3 or 4CH RF Output Impedance75 ohm/1k ohm RF Input Impedance 13±3K ohm ... 3 or 4 Power SourceAC120VFor TVs without AV jacks, this RF modulator helps adapt older TVs to VCRs, DVD players, camcorders ... Includes an S-video input WS-007 Audio Video RF modulator