The mkII has an expression pedal out jack should you need it, and still with no ICs and using only full-size Capacitors throughout the entire audio path! It's 100% Analog, you can't get this sound out of the flavor-of-the-minute Digital pedals using a $3 DSP chip. You need 13 transistors, 4 x correct resistance and response photoresistor, a real & correct incandescent light bulb, and 30 years experience...you need the Fulltone CS-MDV mkII

• Does not include a power supply.