The MPC500 is a compact sampler with 12 pads and various controls. - Model Name: MPC500 - Color: Black - Number of Buttons: 12 - Function: Sampler - Controls: Operation via knobs and buttons Thank you for viewing. I purchased this but couldn't master it, so it's been sitting unused. The condition is very clean with little sign of use. There is no box or instruction manual, only what is shown in the photos. Operation has been confirmed, and there are no issues with its use.