Product review (1 stars): Does Not Work, Do Not Buy
I have had two models this month. For reference I am using them both inside and about 20 feet apart.  One worked fine for a month then stopped.  Returned it, the second one hasn't worked at all.  It reads 158 F for the "outdoor" sensor most of the time, sometime 47 F.  It is in a room that is 70-75 F. Complete junk. Do not recommend.