The Aiphone LE-SS-1G vandal- and weather-resistant single-gang door station works with an Aiphone AX, LAF/LDF-C, LEM, LEF, or MP-S Series master station (sold separately) to enable audio communication with visitors. The 12-ga. stainless steel faceplate and baffle-protected speaker mount using the included tamper-proof mounting screws. The station can either mount onto the surface of a wall using the Aiphone SBX-1G surface-mount enclosure (sold separately) or mount flush onto a single-gang box using the included hardware. The door station is powered by the connected master station. Use Aiphone 822202 wire (sold separately) for the AP-M, LEM, and MP-S Series. Use Aiphone 822202 or 822203 wire (sold separately) for LEF Series. Overall dimensions are 4-1/2 x 2-3/4 x 1-5/8 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?