I purchased this and only turned on the LED light once, and haven't used it since. Most of it is unopened. This is a sale of the complete set of parts only. We will not sell individual parts, so please be aware of this. Please check the photos carefully before purchasing. If you need more information or detailed photos, please contact me. Retail price: 3,500 yen Here is the book information. This is the parts set that corresponds to this book. Since its publication in July 2016, the book "Color Illustrated: Latest Electronic Work with Raspberry Pi" has been very popular for its "too kind!" and thorough explanations for beginners.