Door Alarm, Briidea Refrigerator Door Alarm When Left Open, with 60/120/180 Seconds Delay Alert, Avoid Food Waste Home Alarm Systems NO MORE WASTE FOOD: With our refrigerator door delay alarm, when your refrigerator door left open or ajar, it will issue a sound from low to high until the door is closed. Never worry about wasting foods and electricity anymore EFFECTIVE EXTEND FRIDGE SERVICE LIFE: We all know that the long-term opening of the refrigerator door will prolong the working time of the compressor and shorten the service life of the refrigerator. Now just with a small investment, you can effectively extend the life of your expensive refrigerator, why not? DELAY ALARM FEATURE: It will beep every 10 seconds for the first minute, then a Di Di alert for 2 seconds after 1 minute, reminder alarm for 4 seconds after 2 minutes if the fridge door is still open or ajar. You have 59 seconds to take food out of the refrigerator or freezer CONSTANT ALARM: Continuous alert after 3 minuters, volume up to 110dB loud enough to be heard no matter where you are, and will definitely help you close the fridge or freezer door. It can also a great way to know if your child is stealing snacks at night EASE TO USE: Contains 3 * LR44 batteries for extremely low power consumption for up to a year use. No tools needed, simple peel and stick installation on any freezer or fridge. It's small and it doesn't affect the beauty of your refrigerator at all. (Note: When installing, the distance between the alarm and the sensor should be less than 0.8 inches)