2-family house set with VD-ALU 620 aluminium outdoor station and VDV-907 IP indoor station with 7-inch touch monitor, digital image memory, sensor touch keys and hands-free function without handset This system can be expanded to include up to three outdoor and four indoor units (per doorbell). Regardless of the number of individual components, you only need one power supply to power the entire video door intercom system (DIN rail mounting power supply unit: model DT-2000, which is included in the set). The system impresses with its sophisticated, ultra-thin design and excellent speech quality. The doorbell button on the outdoor station is automatically illuminated in the dark. https://elecena.pl/product/19054967/vd-alu-6209-s-s-video-intercom-system-set-silver 2021-07-13 https://elecena.pl/product/19054967/vd-alu-6209-s-s-video-intercom-system-set-silver 2023-04-06