More on Amazon.com : http://www.amazon.com/gp/product/B000MWWT6E?tag=purrfectcatdi-20 <br /> <br />Electro Harmonix Metal Muff Distortion with Top Boost Guitar Effects Pedal <br /> <br />High input impedance buffered bypass <br />Output volume and master drive controls <br />3-Band EQ bass mid and treble <br />Foot switchable Top Boost with separate control knob <br />9-volt battery included Optional 96DC-200BI power supply available <br />Knob controls include Distortion Bass Midrange Treble Top Boost and Output volume
