SONUUS Voluum Analogue Volume Effects Pedal with Digital VOLUUM
Standalone MIDI expression pedal
BOSS EV-1-WL Wireless MIDI Expression Pedal Silver | Guitar Center
Arduino Based MIDI Volume Pedal - Codeduino
Volume Pedal as a MIDI expression : r/guitarpedals
Cardboard Expression Pedal DIY MIDI Controller for iPhone - Hackster.io
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