I'm selling this because I don't use it. Body only. ・Simulates the distortion characteristics of a guitar amp and cabinet ・Adds a gain boost to the high frequencies for a more powerful distortion effect ・Passive 3-band EQ for natural tone ・True bypass design minimizes sound quality degradation and improves pedal control ・Aluminum alloy casing ensures high durability ・LED indicator displays effect status and battery life ・Can be powered by battery or AC adapter ・Four adjustment knobs Bass knob: Controls the amount of low frequencies Gain knob: Adjusts the amount of distortion High knob: Controls the amount of high frequencies Level knob: Controls the level of the distorted signal