This product is the BOSS MD-2 Mega Distortion guitar pedal. Red metal shell, four-knob design (Level, Tone/Bottom, Dist, Gain Boost), known for its high gain distortion, suitable for hard rock and metal styles. The case has use scratches and there is Velcro on the underside. The four knobs and foot switch function normally. Powered by 9V battery or PSA adapter.