- Model Name: DR-880 - Brand: BOSS - Accessories: Main unit, instruction manual, AC adapter Thank you for viewing. I am selling this because I haven't used it much since I bought it. There is no yellowing, and I think it's in quite good condition for its age. It will be shipped with the original power supply. This is the BOSS DR-880. It has guitar/bass inputs, allowing you to apply amp simulation and effects to your guitar/bass, and you can choose between a guitar amp or line out for the output settings. *Please read the instruction manual before use. I have confirmed the sound output by connecting a guitar to an amp, and the operation of each button. Thank you.