The JP-DA is a surface mount plastic color video door station. The JP-DV is an aluminum die cast surface mount color video door station. The JP-DVF is a stainless steel flush mount color video door station. All of these units work with the JP Series and connect to the master station using an 18AWG 2-conductor solid core cable. Each unit includes a camera, microphone, speaker, and call button. Tamper resistant screws are provided for mounting the JP-DV and JP-DVF units.When the call button on the door station is pushed, the inside 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 JP door stations can be located up to 33' from the master monitor using 18AWG 2 conductor solid core cable (Aiphone wire #87182). Additional equipment is available to extend the wire distance up to 98' to the door (JPW-BA long distance adaptor and 85162 cable).