"Bruce the Unsettled" Compact is a high gain distortion pedal that uses a 12au7 preamp tube for killer compression and tone (Groove Tube GT-12au7 supplied). Included are controls for Disruption (Gain), Tone and Magnitude (Volume), protected top mounted tube, minimal footprint, as well as a customizable bass cut switch. This pedal can be powered by most any 9v DC power supply (the unit does not run off a battery). However, we recommend using a Voodoo Lab MONDO, or Truetone(Visual Sound) 1 SPOT DC power supply for the cleanest signal. Make sure the power supply is using a CENTER NEGATIVE connection. Oh and yes: True Bypass!