The JV-1FD is an expansion station for the JV Series. The station provides an extra monitor for JV Series systems. One can be added per JV system. The station features a 7" screen to view visitors and configure settings. The electrostatic touch buttons to the right of the screen allow users to unlock the door and activate an exterior device. There are multiple call tone options available for the station. Communication with the door station can either be hands-free or push-to-talk. Wiring for the system is two conductors between the JV-1FD and the door station, and six conductors between the JV-1FD and JV-1MD master station (Aiphone 871802 and 871804 PE insulated 18/2 or 18/4 cable recommended).