I have had a good number of different ones over the years and most all of them broke. Oddly enough I have found these cheap analog ones have worked great and I have had them for many years. I no longer place digital ones in the cages and now just have one on each side of my snake room to monitor the entire room rather than each cage.

https://www.amazon.com/Zoo-Med-Econo...%2C186&sr=8-11