UP TO 35 DB OF CLEAN BOOST transparent volume lift that lets your amp and pickups speak push the knob in for pure clarity, pull it out for saturated high-gain grit; PULL-OUT KNOB SECOND MODE pull the knob for a whole palette of overdriven character not quite an overdrive, just enough tube grit to make solos sound alive and dangerous; DRIVES YOUR AMP NATURALLY pushes the front end harder for harmonic richness without artificial coloring your core guitar tone, just more of it and better; DUAL FET CLASS A JFET CIRCUIT Robert Keeley's original design, the same topology that has appeared on professional stages for over two decades this is where it all started; INTERNAL CHARGE PUMP VOLTAGE DOUBLER takes 9V DC input and nearly doubles the operating voltage inside maximum clean headroom and amp-like dynamics no battery, 9V DC only, do not exceed