Visitor Chime, Gray, 2-3/4" W x 4-1/4" H x 2" D
Alerts employees when visitor enters or exits. Pleasant ”dingdong“ sound with high, low, off volume adjustable controls. Light-reactive sensor with sensing distance of up to 15'. Used with door open or closed. Mounts easily on wall or door frame. Operates with 4 AA batteries or 6V DC adapter, not included.