Valeton GP-100 Guitar Bass Amp Modeling IR Cabinets Simulation Multi Language Multi-Effects with Expression Pedal Stereo OTG USB Audio Interface - Walmart.com
Expression Midi Controller | Chocolate Midi Controller - Electric Instrument Parts & Accessories - Aliexpress
Standalone MIDI expression pedal
Amazon.com: BOSS Wireless MIDI Expression Pedal (EV-1-WL),Black : Musical Instruments
M-Audio EX-P Expression Pedal – Thomann United States