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Wireless freezer alarm goes off if the freezer door stays open for 3/15/30/60 seconds, you can easily to set the delay time as your need. It will only
WSDCAM Freezer Door Alarm When Left Open, 3/15/30/60 Seconds Adjustable Delay Wireless Fridge Alarm, 4-in-1 Door Sensor Chime Door Open Alarm Loud
Briidea Refrigerator Door Alarm When Left Open, with 60/120/180 Seconds Delay Alert
Safety Wireless Door Alarm for Home Security Personal Security Window Alarms Sensor Burglar Door Alarm for Pool, Cars, Sheds - AliExpress
Wireless Remote Control Door Window Sensor Alarm 130dB Adjustable Volume PIR Magnetic Induction Detector Security Burglar Siren - AliExpress