Product review (1 stars): Poor Quality Out of the box - Battery Eating Monster!
I bought this as an XMAS gift for my wife. Sadly we did not open it until March so it is out of the return time window. It works when you first put batteries in. Then after a while the outdoor sensor starts acting up, no change in temperature for hours, then working again. Certainly not stable ore reliable. Forget trying to use the outdoor sensor with any rechargeable battery, even a good one like Eneloop won't last more than a couple of days. This should have been designed to require more batteries so normal batteries will last a normal amount of time. Lesson learned and my experience is now your warning.