Visitor Arrival/Departure Chime, Battery Operated, White

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. Color(s): White; Width: 2.5″; Depth: 1″; Height: 4″.