It is misleading to say this is a pack of three. There are three components: wires, circuit board and thermometer. You can easily buy these three components in a bundle for less than $5, and they're not called "3 Pack". Also, I emailed tech support to help me get this working on my raspberry pi and never got a reply. I wouldn't have a problem paying extra for this kit if the customer service was top notch, but they aren't. Otherwise the components look well built, but no better than the $4 kit I already own.