The classification "Multi-Effect" could be so many different combinations. When it comes to pedals, Multi-Effects are typically a single pedal that produce several different effects. For example, the Xtomp includes over 300 different types of effects in a single pedal. Or it could also mean a floor board, such as the Antares ATG-1 which includes Auto-Tune, and much more. Or it could also mean a series of pedals offered up together as a bundle.