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).
Visitor Arrival/Departure Chime, Battery Operated, 2.75 x 2 x 4.25, Gray