Product review (1 stars): Garbage quality!
This product is a heap of s***! I bought 2 and so i open one up to take a look, the soldering work on the PCB is cheap chinese quality. much like a kid doing it. The PCB date code printed rev 2011 and 2009. this product is obvious not new and not created by Extech. it's probably a re-badge of another china junk. If you search on amazon. P3 international is also selling this exact product under a different name. P0270 Mold Alert.

The humidity sensor is reading differently on both of my meters. Extech say 4%? You are kidding me. it's 10% off at least. The temperature sensor is fine though. it is spot on with my Fluke thermometer. I've emailed Extech and they can't even give me a proper response. Extech told me to sent it back for warranty if i find it defective.