Specifications: 108 dB loud alarm 4 feature modes – Time Delay, General Alarm, Constant Alarm, Doorbell; easily set the appropriate mode according to your needs Wireless alarm, battery operated – requires two AAA alkaline batteries (not included) Low consumption design – can work for over 2 years Low battery warning – LED light flashes once every second when batteries need replacement Self-adhesive for easy installation and operation Product size: 3.4 x 1.7 x 0.4 inch Multi-use: 1. Fridge, refrigerator, freezer door alarm reminder 2. Window and door alarm for home safety 3. Cabinet door alarm for store security Package includes: 1 x refrigerator alarm 1 x magnetic strip 1 x user manual Wireless freezer alarm – alerts when the freezer door has been left open for 3s, 15s, 30s, or 60s; allows customizable delay time to avoid unnecessary alerts 108 dB loud alarm – helps detect intruders effectively; door open chime reminds you when children, pets, or others enter or leave 4-in-1 mode: 1. Time Delay Alarm (emits "Di-Di-Di" sound increasing from 0dB to 108dB if door remains open for 3/15/30/60 seconds) 2. General Alarm (alarm stops when door is closed) 3. Constant Alarm (continues sounding even after door is closed) 4. Door Open Chime (emits "DingDong" sound when door opens) Easy to install – simple peel and stick application on most freezers, fridges, or doors; no tools required Wide application – magnetically triggered door alarm sensor for doors and windows; suitable for safes, cabinets, freezers, refrigerators, sliding doors, stores, offices, apartments, hotels, and more