Product review (3 stars): My one and only complaint is that the display is crap. You have to hold it at a certain ...
It seems to be accurate as it is used inside to monitor temperature and humidity in my safe.  My one and only complaint is that the display is crap.  You have to hold it at a certain angle to easily read what is being displayed.  Looking at it any other way and you can just faintly see the numbers displayed.