Door Knock Beacon

The Door Knock Beacon is a flashing light signal designed to flash a bright light when the door is knocked upon for individuals who are deaf or hard of hearing. It is cordless, portable and easily attaches to a door with Velcro or the included hanging bracket so it can be used at home, in a hotel/motel, in an apartment, or in an office. The Door Knock Beacon is activated by vibration and responds only to knocking; other sounds are ignored. The device features a sensitivity switch for thick or thin doors. POWER: Uses one 9 volt battery (not included). DIMENSIONS: 3.25 x 3 1/8 x 2.25 inched. WEIGHT: 5.5 ounces. WARRANTY: One year.