Display of the video image of the outdoor station. During the conversation, a picture of the visitor can be taken and stored in the image memory. Quick access buttons for opening the door, muting and light. Different ring tones can be set for door and floor calls, five polyphonic ring tones are available. Volume of the ring tones can be adjusted. Device depth for flush mounting in a flush-mounted box: 15.75 mm. Equipped with a hearing loop for coupling the audio signal into hearing aids. Device depth for surface mounting: 21.5 mm. Display resolution: 480 x 854 Consumption units: 3. Further information on commissioning and operation can be found in the system manual and the online operating manual.