Von Duprin 2670 GUARD-X Exit DeviceOverviewGUARD X exit alarm lock readily identifies the door on which it is mounted as an emergency exit and secures the opening against unauthorized use. It is ideal for deterring theft in restaurants and retail establishment such as discount stores, grocery stores, drug stores, clothing stores and sporting goods stores. Features & Benefits Non relatching deadbolt means alarm will continue until disarmed by key English with Braille is standard, but