Electro-Harmonix Holy Stain Multi-Effects Pedal Controls: Mix, Amount, Volume, Tone, Color, DistortionBypass and Mode Foot Switches.1/4 in. input and outputDC power input for battery replacementLED indicates whether effect is engaged or bypassed Add pitch shifting, tremolo and tone control and you've got a wildly interactive multi-effect pedal that will inspire any guitar player to make their mark