Product review (1 stars): Not a reliable product.
I bought two, mainly for the humidity reading. I tried using both side by side in the same room. The temperature readings were almost identical,  but there was such a wide range of difference in the humidity readings,  that I couldn't trust either to be correct. When I went online to print a return label I was given a message saying that I could not return the product! I will not purchase this product again, nor will I ever purchase anything from this seller.