I just purchased an 00611A3 Wireless Thermometer through Grainger. After reading all these negative reviews here, I'm glad I didn't order one of the higher-end devices; I likely need to keep my fingers and toes crossed, for all the good that might do. Well, it's installed and seems to be working properly, although whether or not the inside/outside temperatures are correct or not is another question. After a decent interval, I'll be back with a follow-up, sooner than a decent interval if this device fails. Interestingly, reviews on several typical sites (e.g., Amazon) were actually fairly favorable, and such sites very often have scathing reviews of questionable or lousy products.