Alert staff when someone enters or exits your business with this Tatco gray battery-operated visitor arrival/departure chime. Tatco Visitor Chime (15300). • Visitor chime is a great tool to alert employees when visitor enters or exits. • Light-reactive sensor has sensing distance of up to 15 . • Alarm type: security alarm featuring a ding-dong tone with high/low/off adjustable volume control. • Dimensions: 4.25 H x 2.75 W x 2 D. • Comes in gray color. • Mounts easily on wall or door frame. • High/low/off adjustable volume control. • Wall mountable with angle adjustable mounting bracket. • Can be used with door open or closed. • Operates on four AA batteries. • Visitor chime alerts employees when visitor enters or exits. • Pleasant ding-dong sound with high-low-off volume control. • May be used with door open or closed. • Mounts easily on wall or doorframe. • Operates with 4 AA batteries (sold separately). • Door Chime. • 4 AA Batteries (Sold Separately). • Adjustable Volume;Ding-Dong;Light-Reactive Sensor. • Sold as 1 Each.