Model Name: AC Booster Color: Yellow Function: True Bypass Control Knobs: Volume, Treble, Bass Brand: xotic effects Thank you for viewing. The AC BOOSTER was developed based on the concept of "re-examining the category of BOOSTERS and boosting without spoiling the characteristics of any AMP or GUITAR." It honestly gains up without changing the character or characteristics of the instrument. TREBLE and BASS have center clicks, and are flat at 12 o'clock. There is no MID control, allowing for pinpoint EQ settings. The attack feels soft, with a natural lift. #Distortion #EffectPedal #HalloweenOnMercari