Thanks for that Bart, the Avtex tv has a fm transmitter built-in so I can connect it to the cab radio already, the problem is that there is feedback on the speakers, I don't know if this gadget has a more powerful transmitter but I will look into it
Re-feed back on speakers, I’ve found when I use my van stereo link via cable, I have too have both tv and satellite receiver sound on max and control sound level with stereo to get rid of the feed back