Fender's Fuzz effect pedal, an octave fuzz with adjustable Tone, Fuzz, and Level controls. There's another tone knob inside when you open the back cover. It's low-priced, but the fuzz effect is good. Operation has been confirmed. No instruction manual included. - Brand: Fender - Model Name: Fuzz - Control Knobs: Tone, Fuzz, Level, Octave - Connections: IN, OUT, DC Power - Power: 9V Battery or DC Power