Specifications: This alarm features a loud 108 dB sound and has 4 functional modes: standard alarm, continuous alarm, door closing reminder, and doorbell. It operates on two AAA alkaline batteries (not included) and has a low power design that lasts over 2 years. Its self-adhesive backing makes installation easy. Multipurpose Use: 1. Alerts for refrigerators, freezers, and freezer doors. 2. Window and door alarms for home security. 3. Cabinet and door alarms for store protection. The loud alarms effectively detect intruders with 108 dB sound and provide notification for children/pets when they enter or leave. 4-in-1 Modes: 1. General alarm (alerts when doors/windows open and stops when closed). 2. Continuous alarm (activates after 10 seconds of pressing the button; sounds for 30 seconds if not deactivated). 3. Door closing reminder (beeps if the door is left open for 5 seconds, increasing in volume). 4. Doorbell (rings when the door opens). Easy Installation: No tools required; simply peel and stick on any refrigerator or door. Versatile applications for protecting homes, safes, cabinets, freezers, pools, stores, offices, apartments, and hotels. Package includes: 1 x alarm and 1 x magnetic strip.