I needed to replace an existing thermometer that I have had for several years so I decided to purchase this one despite of the negative reviews I have them currently both interview comparing them daily for the last week my old one the piece that goes outside is on my deck under the railing on the sunny side of the house hand this one's piece that goes outside is placed in a tree in the middle of all angles of the Sun so that being said there has been a difference so the accuracy temperature is different my old one it reads at least 9 degrees warmer then this unit which could be accurate because my old unit is located on the sunny side of the house and the new one is in the tree as far as humidity dew point and pressure it seems to be 99% accurate with a regular gauge I have attached a couple pictures of the current temperature and my comparisons the only thing that I do not like about this unit is that it is kind of complicated 2 today's technology you have to push several buttons and maneuver through the screen more so then you should to get to the place you're looking to get so if you can Overlook the complication of setting the system up so far it works wonderful
Note that the only thing difference between my two units is that my old one the date and time is incorrect