This part works smoothly! For me is (was) the advantage in the fact that no more trip hazards in the form of cables between the speakers and the demo (Beamer) exist. The downside: If you reduce the volume on the transmitter (eg on a laptop), then it does not work without a short audio dropouts in the speakers. This naturally disturbs the audience and the presenter annoying. That is why I now leave that part in future away. Too bad !!!