For Busch-free@home and Busch-Welcome. This device allows for central control of up to 16 configurable Busch-free@home functions, including switching, dimming, blinds, RTR, scenes, and Philips HUE. It displays the video image from the outdoor station, and during a call, an image of the visitor can be recorded and stored in the memory. When door calls occur in absence, three pictures of the visitor are automatically saved. It features a hands-free function with adjustable volume. There are access buttons for door opening, muting, and light control. Different ringtones can be set for door and storey calls, with five polyphonic options available. The volume of the ringtones is adjustable. An SD card slot is included for expanding the image memory. It can also be used as a room temperature controller extension unit (up to 8). Designed for surface mounting, the bus connection is made via the enclosed bus terminal.