The Video Converter (RF Modulator) connects DVDs, Digital Video Recorders, video games, camcorders and other audio/video equipment with RCA and S-video type outputs to televisions equipped with an "F" type input. An automatic built-in switch eliminates manually changing between device and cable/antenna. It also connects karaoke machines to TVs with only an "F" jack input. It features selectable channel 3 or 4 output. Can be positioned horizontal or vertical.