Visitor Arrival/Departure Chime, Battery Operated, 2.75 x 2 x 4.25, Gray Pleasant “ding-dong” sound alerts employees when visitors enter or exit. High/low/off adjustable volume control. Light-reactive sensor has sensing distance up to 15 ft. Wall mountable with angle-adjustable mounting bracket (included). Can be used with door open or closed. Operates on three AA batteries and one 9V battery (not included).
