With the Control Switcher, change channels on multiple amps and easily automate any non-MIDI function. Using a Commander or a Ground Control Pro, the Control Switcher allows you to control any amp function via MIDI such as channel switching, activating reverb, boost, equalization, effects loops, etc. It features 4 isolated switches, 4 separate mono jack outputs, a multi-DIN connection, and is powered by a standard 9 Volt supply.