The Unit worked properly for the first six months, and then the alarm started going off for no apparent reason. This was especially annoying at 3:00 in the morning. After reseting the entire unit, it worked for awhile and then began acting erratically once again. There have been times I wanted to throw the whole thing away, but I have persisted. The outdoor transmitter stopped working - even with a reset and battery replacement of both units. This makes the whole unit somewhat useless, since I really want to know the temperature outside. Craftsmanship is mediocre at best, but looked good initially with the wooden face plates, but after 6 months of use (sitting there), the veneered wooden layer started peeling off. It has been a disappointment. I realize it was not the "top of the line" unit, but it wasn't the bottom line unit either. I just wish I could find a unit that was durable and had some longevity.