I apoligize, I didn't see that section. I design consumer electronics for a living and for once I wanted to try and make myself some money, with my ideas, rather than my company. The cost is 10 dollars, It is around teh size of a quarter. The kickstarter campaign includes a video and pictures. There is no warranty. This is really intended to be a quick way for people to add and learn about cap touch. It will include documentation.