Can you confirm that the COM-DEX really does provide only mono sound? If so, that is a really retrograde step compared with the TV-DEX which streams excellent stereo sound. I have two TV-DEX units, one for my living-room TV and one in my study connected to my PC for streaming stereo music and videos. But I currently use the M-DEX for connecting to my smartphone and I had thought that the COM-DEX would be a good replacement for that, with the ability to program it from an app on my phone. The big drawback of the M-DEX is that it only streams in mono and so any music or radio streamed from my smartphone is only in mono. It appears that the COM-DEX suffers from the same constraint and so gives no better sound functionality than the M-DEX. I certainly would not want to buy a unit that gives only mono sound so I guess I shall have to give the COM-DEX a miss unless anyone here can tell me otherwise.