This is MASON by Kingsley. It's part of Kingsley's custom lineup. I've played it for about 30 minutes to check its functionality. Since it's hand-built, there are some minor scratches from the manufacturing process. Kingsley is highly regarded overseas, but it's not available in Japan. Simon, who makes them personally, has a waiting list, so they're difficult to obtain. Furthermore, you have to communicate via email to purchase one, which was quite a hassle. (You can't even order from the official website, so you have to give Simon your card information directly. He was a really nice guy, but I felt it was very risky.) I've become a big fan of Kingsley, and this time I bought several products at once (since I couldn't try them out), keeping some for myself and selling the rest. Because they are hand-built, Kingsley products don't come with a box. Everything in the photos is included. Thank you. The following is an AI description: - Model Name: Mason Valve Tone Builder - Brand: Kingsley - Controls: Gain, Lows, Highs, Volume - Input/Output: Input, Output - Power: 9V DC, 500mA Thank you for looking.