McoMce 2 Pack Freezer Thermometer with Dual Scale

I didn’t think about needing to know the temperature of my freezers (that have no thermometer on them) until I put half a cow in my new chest freezer and the meat was thawing out after a couple of days. I turned it all the way up and everything was frozen again, but then the freezer just kept running. I needed to know the temperature, so I can turn it back up to save energy but still keep everything frozen and these worked great for that. I now have one in my check freezer and my standup freezer.
They just sit there or hang there on a shelf, are every easy to see, read, and could be used the other way if you want to see how warm someplace is as it will ready between -30 below freezing or +80 degrees above freezing.
These are nothing fancy but do the job, and for the price, well worth it.

Found on Amazon: amzn.to/3uHzoGQ
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[@WaschyNumber1]

How can they be calibrated 🤔

[@superd3547]

They shouldn't need calibrated. My two are still working fine.