I purchased this through crowdfunding to support the project. I bought a set of two, and I'm selling the other one since I won't be using it. UPAP is said to have various effects when used, but please research it on the website and consider purchasing it only if you are satisfied. There were some scratches on the box from the beginning. It is an unused item. Please understand that there is no warranty. I will also include a spare silicone piece as a bonus.