Aiphone JK-1SD Audio-Only Sub-Master Station for JK Series Intercom System

The Aiphone JK-1SD audio-only sub-master station for Aiphone JK Series extends the door-answering capabilities of the master station (sold separately) into multiple rooms or over a large area. The door-release button works with an electric strike (sold separately) to remotely unlock the entrance for the visitor. A call can be answered by either holding down the answering button for push-to-talk action or by tapping the button for hands-free communication with the caller. The call button initiates audio communication with the master station for remote communication. The chime and audio volume is adjustable. Housing is ABS plastic. SpecificationsOverall dimensions7-5/16 x 3-1/8 x 1-1/16 inches/185 x 80 x 27 mm (H x W x D)*Maximum door distance from master165 ft. (22 AWG) using 22 AWG wire, or 330 ft. using 18 AWG wireMaximum IER-2 distance from master245 ft. using 22 AWG wire, or 490 ft. using 18 AWG wireCompatible wire (master to door)Aiphone 871802 (sold separately)Compatible wires (master to sub-master)Aiphone 871804 (sold separately)Door release contact rating24VAC or 24 VDC at 500mA. Use Aiphone RY-18L (sold separately) for larger contact rating.Power requirements18VDC. Use Aiphone PS-1820UL power supply (sold separately).*H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.Door intercom systems allow an occupant of a building to communicate remotely with a visitor through at least one door intercom and master intercom. Master intercoms with a door-access button remotely unlock the door for the visitor.Aiphone manufactures intercom systems for residential, business, and healthcare structures. The company, founded in Japan in 1948, has its North American headquarters in Bellevue, WA. Aiphone meets International Organization for Standardization (ISO) standards 9001 and 14001. Whats in the Box? Aiphone JK-1SD master station Mounting hardware Instructions