This fuzz pedal is designed to emulate the sound of the Ram's Head Big Muff. It features scoop and clip switching for easy sound shaping. It also has a boost function, making it easy to use in live settings. The switch may be difficult to toggle if you quickly double-click it, but this behavior was consistent across all the units tested, so it seems to be a characteristic of the circuit. If you leave a gap of about 0.5 seconds between clicks, the behavior is stable, so it shouldn't be a problem during normal use. The knobs are all functioning properly.