Compact Amperos Control 4 Buttons Footswitch Support Standard Usb Bluetooth Midi Foot Controller Volume Expression 2 In1 Pedal - Guitar Parts & Accessories - AliExpress
Toes - teensy MIDI USB and DIN foot controller [V1.0 tested and ready!] - General - lines
Conduit TRS & USB MIDI Hub - Strymon
Button Midi Foot Controller Pedal Usb Rechargeable Turner - Guitar Parts & Accessories - AliExpress
USB Pedal | eowave
Amazon.com: BOSS Wireless MIDI Expression Pedal (EV-1-WL) : Everything Else
Harley Benton MP-100 MIDI Foot Controller – Thomann UK
MIDI Foot Controller 4 Button USB Pedal Compact for Guitar Amp | eBay
Audiofront
Nektar Pacer MIDI Foot Controller | Sweetwater
MIDI Expression
USB Foot Control | eowave
Footswitch MIDI | MIDI USB Pedal Controller
Crumar UP4 USB-MIDI Expression Pedal | Sweetwater
USB Footswitch | eowave
Standalone MIDI expression pedal
MIDI Commander - Portable USB MIDI Foot Controller - SoundsRight