The Red Brown gets it's inspiration from the Wampler Pinnacle Distortion. It's all around the Brown sound..... Mosky Audio continues with a full line of tonal support and all within the price of any player. 4-MOD VOICE Switch This control essentially sets the overall voicing of the pedal's frequencies, to be either darker with a classic tonality or a bit brighter and more modern. Settings can seem subtle but we are talking about those little nuances that can make a note sing out. Contour This adjusts the frequency emphasis overall. It interacts substantially with the Tone knob. Volume This control adjusts the output level of the Red BROWN. There's plenty of volume on tap in either standard or Boost mode. Boost Toggle This switch alters the internal gain structure of the pedal to bring much more drive, heavier and more aggressive distortion when engaged. Gain This control, in conjunction with the Boost Toggle , lets you dial in anything from a classic, almost laid back early rock tone all the way to modern high-gain mania. SPECIFICATIONS: True Bypass POWER CONNECTOR:9Vdc, center negative, 2.1mm x 5.5mm ( Not Included) Dimension(L*W*H):11.5*6.5*5CM Weight:320g