DBEACON Global Door Beacon

Designed for one room use or travel, you can reley on the Door Beacon to let you know someone is at thr door. The bright light will flash for several seconds after someone knocks on the door. It is activated by vibration and allows you to adjust the sensitivty with the feature of a vibration sensitivity switch. Use it for the entry door, bedroom, bathroom, hotel room, dorm or workplace. Door hanging bracket/hook & loop fastener included. Uses one 9V battery (not included). One year Manufacturer's warranty.