For installation in door stations or letterbox systems with TwinBus technology (Acero, Vista or on-site). Weatherproof loudspeaker. Adjustable microphone volume. Adjustable voice volume. For addressing 12 bell buttons. Address part removable. Plug strip for connecting extension units with more than 12 bell buttons. Use max. 7 extension units 14923.. Dimensions: 70x152x20 mm (WxHxD). Accessories: ==>Expansion unit 14923.. Color: black.
