Product review (2 stars): Not even a little accurate. it shows 7 degrees ...
Not even a little accurate.it shows  7 degrees more humid than actual humidity.  Put it to the test with two others that both showed the same 72 degrees to the 78 or 77 on this one. Used Bovida packs and a freezer bag with 4 cigars. Now all laying in my humidor.  Its cheap. Threw it away