Thank you for viewing! This is an official K-ON! effector made by 320Design. I am listing it here to organize my equipment. It has only been used at home and is in good condition. The knobs and connections are in good working order, and I have confirmed that it works. I have been storing it in a dark place since I started using a replacement. Also, the box and instruction manual are not included. This is a sale of the main unit only. Therefore, I have priced it lower than others, so please take this opportunity to purchase it. It's one of my favorite items because it can reproduce sounds very close to the guitars in the actual K-ON! songs. Please consider it if you are interested. I will lightly clean it before packing and shipping. Feel free to comment if you have any questions (*^^*)