The tm rf allows video from a satellitefreeview receiver vcr dvd blu ray player camcorder cctv camera dvr or other devices with an av output to be viewed on a another tv or a tv without a scart or phono input it does this by converting a video signal into an rf signal over coaxial cable cable required with a scart loop through it allows products that have only 1 scart output to be connected to your main tv in scart quality or to be connected to a vcr dvd recorder blu ray record