Aiphone IE-1AD Chime Tone Single-Door Intercom System Master Handset with Door Release Button

The Aiphone IE-1AD Chime Tone single-door intercom system master handset works with a door intercom (sold separately) to enable semi-private communication with visitors prior to authorizing access to the building with the door release button. A call from the door intercom activates a four-tone chime on the master handset. Picking up the handset at any time opens the line of communication with the door intercom, and the door-release button works with an electric strike (sold separately) to remotely unlock the entrance for the visitor. The chime and audio volume is adjustable. SpecificationsDoor release contact rating24V at 500mAMaximum door distance from master500 ft. using a 22 AWG wire, 1,200 ft. using an 18 AWG wireCompatible wire (door to master)Aiphone 822202 (sold separately)Power requirements12 to 16VAC 180mA bell transformer to power both audio and electric strike, or 12 to 24VDC 160mA Aiphone PT-1210N AC transformer (sold separately) for audio only.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 IE-1AD master handset Mounting bracket Mounting hardware