Door Window Open AlarmDoor alarm can be used as an alarm Alerting you when someone opens the door or window, or as a way to remind businesses on the front door when a customer’s coming in. Home Security SolutionThe security alarm is perfect for notifying you when there is an unwanted entry. Great for Burglar Alert, protect your children’s room or stop anyone from sneaking out or in. 120 DB Loud AlarmAudible at over 800 feet, it sounds loud enough to cover your house or store, the alarm sounds when window or interior door is opened by kids or elder. Prevent Any Mishap Keep children away from cabinets, pool, window. Monitoring wandering, sleepwalking, elderly themselves out of bed, avoid all kinds of dangers. Easy To InstallJust Peel and stick the product to the door or window with double-sided tape. No Drilling. No Tools. (NOTICE: MAKE SURE THE GAP BETWEEN THE ALARM AND MAGNET PART WITHIN 0.4IN)