Video-Türsprechanlagen und mehr: Gebäudekommunikation | Merten
RITTO TwinBus 17230 Hands-Free Kit with Bus Plug and Instructions (English language not guaranteed), Colour: White or Black, Officially Used as a Demo Item : Amazon.de: DIY & Tools
RITTO RGE1786570: Indoor unit for TwinBus video doorspeaker at reichelt elektronik