Guitar effects pedal combining overdrive and distortion functions. - Model Name: OS-2 - Functions: Overdrive/Distortion - Color: Yellow - Controls: Level, Tone, Distortion - Connections: Input, Output Operation with batteries and AC power confirmed. Appearance is generally good. Upon using it after a long time, I felt there was more noise than when I played it before. As I can't determine if this was the original level, I'm selling it as-is at a low price. Thank you for looking.