Title: Not a high quality product.
Review: I used this hygrometer in a terrarium that is designed to grow mushrooms, which require a 75-95 percent humidity level. After calibrating the hygrometer worked for about a day then whenever the humidity level went above 89% the numbers were replaced by two dashes i.e. 75F 89% then 75F --%. Sometimes the unit would stop displaying entirely and I would have to remove the battery and put it back in. I am disappointed with the performance of this product although it did include a magnetic plate that glues to the inside of your terrarium/humidor which I found to be very convenient. If the unit would have just performed as it was supposed to I would have been satisfied.
Is this product review negative?