Product review (5 stars): You can't beat it for the price
I bought this to put in my garage so I knew how hot it was getting.  This is far more than just that.  The only (small) issue is that it gives you an error if it goes over 50C (122F) which happened when I left it outside in the sun on a day when it was 44 (110F).  So if you live in Death Valley you might want to consider a different one.  (btw, it reset when I took it back into the house.)