Finally getting around to writing this review. I had bought this model, luckily for only $6 back last July. It did not work at all out of the box. Would not go below 50 degrees or so, even in the freezer. At the time I also bought the MUI #90062MIU #90062 Commercial Freezer Thermometer, which worked fine, as in both the fridge and the freezer, and it has a much nicer display, and since they raised the price on the Cookrite, the MUI model is cheaper too. I verified the Mui is accurate with a mercury thermometer. The Cookrite would come close, like I wrote it was off by over 30 degrees. I was going to send an email to the maker of the Cookrite or return it to Amazon, but for 6 bucks it wasn't worth my time to pack & ship. Maybe some people got lucky, as I see from some of the other reviews, good for them, but mine was junk.