The MM-2 is a guitar/bass-effect pedal with a main focus on overdrive sound. With the two built in knobs for emphasizing the lowest octaves and adding more brilliance and crispness to the fundamental string frequencies, you can change the sound to your personal preferences. And of course, the gain of the overdrive sound can be adjusted as well as the volume itself. Due to its small dimensions and full metal shell, it is perfect for mobile uses.