★Equipped with a polarity switching switch, this sustain pedal is compatible with a wide range of models! The SP-1 is a compact foot switch. It is an unlatching type with a polarity selector switch, so it can be used with sustain pedals on MIDI devices from all manufacturers. Sustain pedals may have different polarities depending on the manufacturer. For this reason, if you use an incompatible product, the normal situation will be "holding the pedal down = sound will continue to play." However, M-AUDIO's sustain pedal has a polarity switch, so it is compatible with products of either polarity type, making it an excellent product! Main features of the SP-1: Functions as a sustain (damper) pedal, etc. Unlatching type (only on while the pedal is pressed) Equipped with a polarity switch, it can be used with MIDI devices from all manufacturers, including M-Audio. 1/4-inch cable included (approximately 1.5 meters). Durable and sturdy design