Features: Whole aluminium-alloy chassis, stable and strong. Entirely gaining and boosting the distortion degree of metal. The special and strong distortion effect. 3 controlling knobs and 1 switch are accurate and high sensitive. Distortion knob for mixture of distortion degree. Tone knob for brightness of tone. Volume knob for adjust volume of distortion sound. 3 way switch for high boost, boost off and low boost. LED light up when working. Output and input jack of 1/4 audio jack. True bypass in order to protect signal integrity when the pedal is not engaged.