“I actually got this Thermometer due to accidents leading to Freezer door left open over night on side by side fridge, works great with the dual zone and a set alarm will sound if the fridge or freezer goes above a set temperature. I also like that the unit is magnetic to attach to the fridge and can quickly see min and max temps over 24 hour period. Going to get another for camping as the kids don't close the fridge lids all the way up.”