Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very Unreliable

Much the same experience as the other reviewers reported. The sensor would stop reporting temps to the receiver even though only 5 feet apart through open space. Bettery life seemed okay, at least for 3 - 4 weeks while I tried this product. I checked battery condition thinking that might be the cause of the problem, but all batteries showed GOOD on the tester. (See comments about battery life by other reviewers.) I am returning this product, and possibly going for a different brand.