Mission EP-1 Black *used Mint Condition*used Mint condition The EP1 expression pedals feature a reliable single channel output that is driven with a high quality sealed potentiometer. The EP1 is a full range sweep expression pedal built to last with all metal construction. Mission Engineering delivers one great expression pedal that meets the needs of most applications. The EP1 Mission Engineering Expression Pedal works with a wide variety of MIDI controllers, processors, and stomp boxes.