BowLift | Anti-collision Travel Door Stopper AlarmAre you living by yourself and feeling vulnerable at night? Or perhaps you're on a business trip, anxious about your safety while you rest? With this anti theft door lock, you can finally stop worrying about break ins while you sleep. Its as if you have your own personal security guard. Product Details: Model: Alarm Door Blocker Material: aluminum alloy Purpose: secures the interior door Compatible door thickness: 5 35mm Powered by two CR2032