The Mission EP-1 is a professional quality all metal, single channel expression pedal. The EP-1 is compatible with a large range of digital amps, effects units, MIDI controllers and stomp boxes, and can be used anywhere you would use a Roland EV-5, M-Audio EXP, Boss FV500, or similar pedal. The EP-1 features Missions resilient metal chassis, and purpose designed sealed 10K linear potentiometer. A single 1/4″ TRS output jack connects the pedal to your device with a TRS cable The EP-1 can be fitted with an optional spring load that will always return the pedal to heel down. This is great for players who are looking to recreate the feel of a spring loaded wah pedal, or when using the pedal with an auto on/off detection such as the Fractal Audio auto-engage feature.