External Microphone for Door Transmitter

An accessory that connects with a Visit Door Transmitter, to detect a sound source that is hard to reach.    Description The External door microphone from Bellman & Symfon is an accessory specially designed to work with the Door Transmitter, when the sound source is located too far away from the internal microphone or when you need individual notifications from for example the doorbell and intercom.   Compatible with  Door Transmitter