This is a one-way pedal. You don’t pass your signal through it, but let it control any parameter supported by devices that has voltage control or an expression pedal input. It could be a digital amp, an effect pedal or a synth. Simply use a standard TRS (stereo) cable to hook up the pedal and let it control e.g. Rate or Depth on a chorus effect, pitch for Whammy-like effects, reverb tails or whatever you could imagine. This is pedal that sparks inspiration!