This is a multi-functional bass effects unit, allowing adjustment of clean and distortion sounds. - Model Name: bass d.i.+M80M - Functions: Clean, Distortion, Gate, Treble, Mid, Bass adjustment - Output Terminals: Direct Out, Parallel Out - Power: Battery or AC adapter compatible - Accessories: Quick Guide, Warranty Thank you for viewing. Used a few times, but in good condition with no noticeable scratches.