The Barefoot Buttons WingMan Afterburner foot control knob is an effects pedal controller that allows you to change effects parameters with your feet while playing. It comes with two shaft inserts, enabling it to fit both classic- and boutique-style pedals. It also has a compact wing design, giving it a minimal footprint on your pedalboard, and comes standard in a glow-in-the-dark configuration. Replace any factory knob with the WingMan Afterburner and gain real-time control over your effects parameters with your feet.