Bellman Visit Door Transmitter Microphone Cable Various Sizes
The external microphone is used together with the Visit door transmitter to detect a sound source that is hard to reach.
Brand : Bellman
This microphone extension gives the door transmitter the reach to listen to sounds up to 2.5m or 0.75m away.
The door transmitter can recognise other sounds. Such as from your doorbell, intercom or other existing alerting devices.