Details: Krown Manufacturing DK125 Door Knock Notification

An effective alerting device for home, office, dorm, hotel or motel, Krown's Door Knocker 125 can be placed above any door and its ultra-bright LED indicator will flash repeatedly alerting you someone is knocking. A convenient travel companion, the Door Knocker 125 is small enough for purse or carry-on, and versatile enough to substitute as a high-powered flashlight.