Product review (2 stars): Not an accurate piece of equipment. as stated. ...
Not an accurate piece of equipment as stated.  Checked it accuracy with three other humidity temperature testers. One was the same model and they all were within 2% of each other.  Obviously, the one I had was faulty.  I returned the item to Amazon after talking with one of their customer service reps, and they had the gall to charge me 20.00 dollars restocking fee.  I get a defective tool and I get charged 20.00 dollars restocking fee.  This I will be addressing in the near future.  Just thought you might want to know before you do any business with Amazon.