This Dahua door station is built for 2-wire IP and 4-wire hybrid video intercom systems in villas and apartment buildings. As the outdoor unit, it contains the camera, microphone, speaker and call function that let visitors reach residents and be seen on the indoor monitor. The 2-wire IP option sends power and data over only two conductors, simplifying installation and making it easy to upgrade older buildings, while the 4-wire hybrid option suits sites with traditional four-wire cabling. Villa and apartment versions are available, from single-household entrances to shared entrances serving many residents. With one product family covering several cabling situations, installers can standardise on a single system across different projects.