IdiotBox Blower Box Bass Distortion Controls are Top Left - Volume, Bottom Left - Distortion, Top Right - High cut/boost, Bottom Right - Low cut/boost. The low boost keeps the beef and the high boost adds the snap. Acid etched smaller 4 5/8" x 2 1/2" x 1 1/2" 125B sized enclosure, true bypass switching, common 9v center negative BOSS style power input and battery snap. Current draw 2mA. Power supply not included. This current version is the same circuit as the Demo videos but now has a smaller enclosure and all knobs up top and more output for lower gain settings. All feedback on this sucker is 100% positive