Seymour Duncan What is MIDI and How Can I Use It? - Guitar Pickups, Bass Pickups, Pedals
Hammond XPK-130G 13-Note MIDI Pedal Board with Built-In XPK-130G
Standalone MIDI expression pedal
MIDI Expression Pedal EX3. Programmable and configurable. An autonomous MIDI expression pedal for sending CC events (e.g. Volume or Modulation), Pitch Bend or Aftertouch. : Amazon.co.uk: Musical Instruments & DJ