GREEN CRYSTAL OVERDRIVE gives you a crystal-clear and transparent overdrive. This is product of years of tireless & and again tireless research in pursuit of the true vintage overdrive pedal tone, Dr. J brings you the Green Crystal Overdrive.?This compact pedal delivers the characteristic overdrive tone of tube amplifiers: clear, transparent, warm and natural with a dynamic feel without the compression. High and Low frequency knobs, 3 options for diode clipping, and great adjustable tone range. You"ll love the broad and natural range of frequency response.?True Bypass design minimizes tone loss