Intercom set consisting of (external doorbell with camera + internal screen + 16 GB memory) External camera up to 1080P resolution Resistant to external conditions and temperatures Night vision up to 3 meters 7-inch color screen works on Wi-Fi, allowing audio and video communication Possibility to open the door lock via the screen and mobile remotely via the hik-connect application Possibility to increase the number of units as needed (external doorbell or internal screen)