PLUS: Solid build quality of the case, looks good. MINUS: When you have connected a door opener, can this, after gentle removal of the bell plate (flat object or needle) and slide down the speaker cover, press with a cable bridge. The module shows which terminals you have to short-circuit. Therefore, only one star.
I mounted my Toorlinemodul from Telegärtner. With this only the speakers that are micro (note minimum distances) and the push buttons mounted outdoors. Microphone and speaker lead I extended (about 3m). The understanding is very good.
