One knob FUZZ madness! ABSOLUTELY RIPS! The circuit uses a single HIGH gain MPSA13 transistor to crank out fuzz goodness. Plenty deep sounding without being too boomy like some other fuzzes. Handmade prototype fuzz made here in Dallas, TX. Soldered by hand, by me with 10+ years pedal building experience. Enclosure is a seafoam blue, professionally powdercoated in Plano, Texas.