The RFM-1 modulates a video and audio (mono) signal of VCR, satellite receivers, security camera, etc. to a user selected TV channels. RFM-1 is a single input Mono Modulator.  The RFM modulators incorporates a commercial grade design intended for non-adjacent placement of the modulated channels in any free area of UHF band or the CATV ULTRA band. The channel selection of RFM-1, UHF or CATV ULTRA channels can be done by a built-in switch.