Specifications: 108 dB loud alarm with 4 feature modes – time delay, general alarm, constant alarm, and doorbell mode, allowing you to easily select the appropriate setting based on your needs. Wireless alarm powered by two AAA alkaline batteries (not included). Low power consumption design enables operation for over two years. Low battery warning indicated by LED flashing once per second when battery replacement is needed. Features self-adhesive backing for simple installation and operation. Product dimensions: 3.4 x 1.7 x 0.4 inches. Multi-use application: 1. Refrigerator, freezer, or fridge door alarm reminder 2. Window or door alarm for home security 3. Cabinet door alarm for retail or storage security 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. Delay time can be adjusted as needed. 108 dB loud alarm helps detect unauthorized entry through doors or windows. Door open chime provides an audible alert when doors are opened, ideal for monitoring 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 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. Suitable for most freezers, refrigerators, doors, and windows. Wide range of applications: Magnetically triggered door alarm sensor designed for use on doors and windows to enhance security. Ideal for use on safes, cabinets, freezers, refrigerators, sliding pool doors, stores, offices, apartments, and hotels.