Specifications: 108 dB loud alarm with 4 feature modes time delay, general alarm, constant alarm, and doorbell. Easily set the appropriate mode according to 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 every second when battery replacement is needed. Self-adhesive backing for easy installation and operation. Product size: 3.4 x 1.7 x 0.4 inches.Multi-use application: ideal for refrigerator, freezer, or fridge door monitoring; suitable for window and door security in homes; useful for cabinet protection in retail stores. 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 for 3, 15, 30, or 60 seconds, preventing unnecessary alerts during normal use. Adjustable delay time allows customization based on preference.108 dB loud alarm helps detect unauthorized entry through doors or windows. Audible chime alerts when doors are opened, providing awareness of movement by 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 3, 15, 30, or 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 single "Ding Dong" sound when the door opens Easy to install with peel-and-stick adhesive on most freezers, refrigerators, or any door surface without tools. Suitable for use on safes, cabinets, freezers, refrigerators, sliding pool doors, stores, offices, apartments, and hotels.