Mission Engineering SP-1The first Mission Pedal, the SP 1 is our unique switching expression pedal. There are two 1 4' output jacks, one for the expression pedal and one for the switch. The switch is operated by pushing down on the front with your foot in the same way as a traditional wah pedal. This is used to turn a pedal driven effect such as a wah or vibrato on an off at the pedal itself. The SP 1 is compatible with most MIDI controllers and processors with two or more