Modded from a Dunlop mini volume/expression pedal, this pedal will give you some cool abilities to tweak your sound in real time. You can even get the chikka-wakka vibe of a standard wah-wah with your Micro-Tron III. It is very useful to fine tune “the bubble” when going in between up and down settings or when plying up and down the neck through various registers. 1/8″ to 1/4″ TRS cable included.