Features: Electric guitar distortion effect pedal for guitar players. With 3 functional knobs(Tone/Level/Gain) for adjust the performance of the distortion effect. True bypass footswitch for switching between distortion effect and bypass status. LED light for indicating effects or bypass status. Full metal shell and compact size, durable and portable. Functional Knobs: --Level knob: adjust the level of overall output --Tone knob: adjust the tone color of the distortion sound --Gain knob: adjust the gain of the distortion sound