Factory set to John's personal settings - volume to add gain, Q to shape the width of the effect and a 6 band EQ to shape the tone of the Wah sound, from 100 Hz to 3.2 khz. Want to fine tune the sound to your own preference? Just take off the bottom plate and tweak away. Comes in sturdy road ready housing with custom smoked chrome finish and JP shield logo tread. True hardwire bypass. Powered by 9 volt battery or AC adaptor (ECB003).