The Nose pedal is an expression pedal mostly commonly used for Line 6 products such as the DL4 Delay, MM4 Modulation, M9, M13, PODs with expression outs, as well as many other pedals. The Nose pedal can open up more channels on your pedals, as well as morphing between two settings to create new crazy sounds. It is controlled by a big fat knob to be used with your foot. With a small compact design and not needing power, this pedal will not take up much room on your pedal board. This nose expression pedal is a must have extension to your pedal!