Product review (1 stars): IT ONLY WORKED FOR A LITTLE WHILE
Today, I contacted the Mfg. and they are going to make this right, So, as soon as they do, I will delete the negative review.

Initially it worked fine and I was very pleased, but after about a month, I noticed the humidity reading was off, compared to all the other meters i have in the same enclosure.  I changed the battery several times, but it still is "way way" off.  So it is worthless!