This is a guitar effects unit that combines a distortion and a booster. The distortion alone produces a classical sound, but by using the booster, you can create a modern high-gain sound. The distortion has volume and drive knobs. There are two lever switches; the Type switch selects different diode clipping options, allowing you to choose between two types of tones. The MODE switch allows you to change the strength of the mid-low frequencies. The booster has two knobs to control boost and distortion. The lever switch allows you to select between three boost settings: mid, treble, and full boost. Each effect has its own footswitch, allowing them to be used independently. The power supply is center-negative 9V. The unit is unpainted, so be careful not to touch the metal parts of the AC adapter. Included: Rubber feet, one-year warranty