Product review (1 stars): broke- and it cost me a lot of money
Did not work.

We had faith in this device that it was working.  One day our newer freezer with a side of organic beef died.  This device did not tell us.
moreover, it sat on the table for a month after the incident still reporting that it was at the proper temperature in the freezer.

Ours was obviously broken and I question if it ever worked.
We found out the hard (and expensive) way that it was defective, and our trust was blown.