Specifications: 108 dB loud alarm with 4 feature modes – time delay, general alarm, constant alarm, and doorbell mode; easily select the appropriate mode based on your needs. Wireless alarm powered by two AAA alkaline batteries (not included). Low power consumption design allows operation for over 2 years. Low battery warning indicated by LED flashing once per second when battery replacement is needed. Self-adhesive backing for easy installation and operation. Product dimensions: 3.4 x 1.7 x 0.4 inches. Multi-use application: ideal for refrigerator, freezer, or fridge door monitoring; suitable as a window or door alarm for home security; effective for cabinet or storage security in retail environments. Package includes: 1 x refrigerator alarm, 1 x magnetic strip, 1 x user manual. Wireless freezer alarm activates only when the door has been left open beyond the set delay time of 3, 15, 30, or 60 seconds, preventing unnecessary alerts during normal use. Adjustable delay settings allow customization based on preference. 108 dB loud alarm effectively detects unauthorized entry through doors or windows. Audible chime alerts users when doors are opened, helping monitor activity from children, pets, or others. 4-in-1 functionality: 1. Time Delay Alarm – emits a "Di-Di-Di" sound increasing from 0 dB to 108 dB if the door remains open for the selected duration (3/15/30/60 seconds) 2. General Alarm – alarm stops when the door is closed 3. Constant Alarm – continues sounding even after the door is closed 4. Door Open Chime – plays a "Ding-Dong" sound each time the door opens Easy to install with peel-and-stick adhesive; no tools required. Compatible with most freezers, refrigerators, doors, and cabinets. Widely applicable: magnetically triggered sensor provides protection at entry points such as doors and windows. Suitable for use in safes, cabinets, freezers, refrigerators, sliding pool doors, stores, offices, apartments, hotels, and more.