Product review (4 stars): Looks like it is working
I bought this for checking the temp and humidity in my attic.  Since I don't have access to a laboratory calibration system to check the accuracy I have to assume it is reading correctly.  I did try to adjust the temp based on another thermometer and it was not as "adjustable" as I thought it should be.  It did not allow for the precision that I thought it should based on it's price, and that is why I rated it 4 rather than 5 stars.  But the display is large and easy to read.  I do not plan to use the alert, I will check the readings periodically, since it is in the attic I would not hear the sounds anyway.  I also have not used the probe, I just keep it attached to the case, but it is a nice extra.  I will use it for a year or so, and if it continues to perform well, I will buy another for the basement to monitor the humidity in that area.