Lousy quality textolite on the output microphone, in general, I would make this microphone removable so that it would be possible to stick it in different lengths, you need one button but it is conveniently pressed, as practice shows in exam conditions, more than one button just interferes, a better-thought-out binary signal system
For the dealer: if the teacher knows how it works and intends to ask for understanding, the earpiece will not help
In my opinion, this method is good only if you neeSee full review