Frienda 12 Pcs Black Digital Fridge Thermometer Waterproof Refrigerator and Freezer Max/min Record Function LCD Screen Refrigerator Thermometer with Hook and Magnetic Back for Home (Button)

So far all seems to be working well. Accurate reading and easy to read.

These work and seems to keep ok temperature, at least enough for my curiosity's sake. My complaint is that every so often they default back to Celsius and I have to tap the temp button to get them back to Fahrenheit. But, next time i check it, it's on Celsius.

Works great. Easy to read temps

The battery is fine, but the units themselves have a very short lifespan.

They work as advertised.

Not a good thermometer if you want an accurate temperature reading. Put them side by side and if you have 5 of these you will get 5 different readings.

Helps identify temp zones in Refrigerator. Shows current temp and high and low temp since last reset.

I got this 12 pack, thinking it was a great bargain. Well, I now think I should have paid more for less but better quality ones. These things ALWAYS flip from F to C. The screen goes blank (mind you they are supposed to be designed for fridge/freezer, so you would expect the cold to NOT be a factor, but it seems to very much be one). The magnet seems kind of useless as the inside of fridge/freezer is plastic or glass. And the hood bit can't latch onto anything in 3 freezer/fridges I tried. Also a couple of them were DOA (probably battery, but I didn't bother unscrewing them to find out since I had 12...) One even came upside down LOL!