Volume/Expression pedal, mostly used by keyboards but I used it to regulate a guitar univibe pedal and it worked great.
Vintage 1960’s Vox volume/expression pedal
Vintage VOX Volume / Expression Pedal – c.1960s – Original Internals – Tested
volume expression pedal for keyboard
Technics SZ-E2 Volume / Expression / Control Pedal, Used
Volume Expression Guitar Effect Pedal 2-in-1 Dual Control Silent Buffer Metal
Volume Expression Pedal Swell Organ Midi Hauptwerk - Organ Organ Concert UK
