Product review (1 stars): SAVE YOUR MONEY
I have been struggling with this unit since I bought it. All it does is read the inside temp. and relative humidity. It will not indicate the outside temp. which is really what I needed. It shows a strong signal when it starts up and than it just dies. This unit is worthless. If you don't know how to make it work, then don't sell it.  They have some bugs to work out. I gave it one star because the indoor thermometer seems to work.