The Aiphone LE-D surface-mount door intercom works with the Aiphone LEF and LEM Series master intercoms (sold separately) to enable remote audio communication with visitors. The call button initiates a chime on the master intercom, indicating a visitor at the door. The intercom faceplate is weather-resistant black plastic and surface mounts to a single-gang box using the included mounting hardware. Housing dimensions are 120 x 88 x 29 mm/4-3/4 x 3-7/16 x 1-1/8 inches (H x W x D). (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. WHAT'S IN THE BOX? * Aiphone LE-D door intercom * Mounting hardware

Weather-resistant black plastic faceplate surface mounts to a single-gang box using the included mounting hardware. For use with the Aiphone LEF and LEM Series master intercoms (sold separately). Surface-mount door intercom works with a master intercom (sold separately) to enable audio communication with visitors.