108dB Freezer Alarm with Adjustable Delay

Dimensions: 2.36 x 1.57 x 0.79 inches; weight: ~65g per alarm unit. Operates on two AA batteries (not included), rated for up to 2 years of continuous standby. Installation requires exact positioning: magnetic strip and alarm unit must be mounted within 20mm (0.78 inch) and aligned using the arrow markers on both components. Made from robust ABS plastic for resistance to temperature fluctuations and everyday handling. Four functional modes include: timing alarm (sound begins after door remains open for 3/15/30/60 seconds), general alarm (stops when door closes), constant alarm (keeps sounding after closure), and door-opening chime (single Ding-Dong tone). Maximum output volume is 108dB at 1 metre — sufficient to penetrate ambient kitchen noise or background office activity. Compatible with freezers, fridges, cabinets, safes, sliding pool doors, retail shops, offices, rental apartments and hotel service entrances.