So in the few years since I have posted this, I have run into this problem over and over. It is more about the wireless internet being broadcast in the room than the product itself. Being a 2.4gHZ transmmitter, that bandwidth has just gotten so clogged that unless I can scan a room I won't use these units in it. I just had another reoccuring event we do switch from a WDMX system back to a hardwired system because of the signal getting stomped on by the resort's new wifi system.