The Aiphone JK-DV is an aluminum die cast surface mount color video door station. This unit works with the JK & JM series and connect to the master monitor using an 18AWG 2 conductor solid core cable. It includes a camera, microphone, speaker and call button. Tamper resistant screws are provided for mounting. When the call button on the door station is pushed, the master station(s) ring and the video monitor comes on with the image from the door station’s camera. The master station user will initiate communication. The person at the door station speaks hands-free. The JK door stations can be located up to 330′ from the master monitor using 18AWG 2 conductor solid core cable (Aiphone wire # 871802). Additional equipment is available to extend the wire distance up to 980′ to the door (JKW-BA or JMW-BA long distance adaptor and 851602 cable).