Please check my profile before purchasing. If you purchase this item with other items I have for sale, you can get a 500 yen discount. I will consolidate the product information, so please comment before purchasing. This is a Tube Screamer-type overdrive. There are no issues with the sound. A 9V center-negative adapter is required for use. It cannot be battery-powered. This is a handmade and used item, so there may be some overlooked areas. Please refrain from purchasing if you are looking for a new item or are very particular about condition. I will pack it in a case, wrap it in bubble wrap, and put it in a cardboard box for shipping. Shipping is free and anonymous. If you have any questions, please ask before purchasing.