This is a clone of the JHS Crayon pre-amp / console / fuzz pedal
Very versatile pre-amp, part of the JHS Colour Box

Controls are Master, Pre-Vol, Tilt, and a Hi-Pass toggle. 
The Master volume controls the overall volume of the unit, while the Pre-Vol acts as a gain control to go from a gritty preamp drive to over-the-top gated fuzz. These controls work together to create a ton of color tones that are extremely useful. 
The Tilt control is an active EQ where when set at 12 o’clock you have a flat EQ while turning clockwise boosts highs and cuts bass, and turning counterclockwise boosts bass and cuts highs. This gives the Crayon the ability to be tailored to any rig for bass or guitar. 
The Hi-Pass toggle on the side of the pedal cuts your low end with a flick of the switch for the ability to cut through the mix or get lo-fi sounds. Choose either 200Hz or 750Hz cut for the Hi-Pass using the toggle near the bypass switch.
9v - 18v centre negative only (works best on 9v)