This is the MeloAudio Midi Controller and Expression pedal. These units will work with almost every type of midi-controlled devices such as the Kemper Profiling Amplifier, Axe-FX 3, Marshall Amplifiers, Bias FX, and much more.
In this video, I show you how I set up my Kemper using this inexpensive alternative to the Kemper footswitch. This pedal is much cheaper than the official Kemper footswitch and it works a treat. I also show you how it works with my Marshall DSL40CR amplifier to switch between all 4 channels.