Product review (2 stars): Exterior thermometer failed after 2.5 years
I bought this item in March 2014 from Amazon. It worked fine for two and a half years, as far as I could tell (I never had a chance to calibrate it with another device but I didn't sense it being off the mark). The design and build quality seemed fine, and range was good - it read thru walls halfway through a small house w/ few windows.  However, late in 2016 the exterior temperature readings went way off, like 20+ degrees off, rendering it useless for outdoor temperature.  I don't expect a device like this to last ten years, but only two and a half years?  That's a non-starter.