MIDI Expander for Keith McMillen Instruments 5 pin MIDI In & Out enables communication with hardware devices Powers your KMI controller and enables standalone use without a computer Includes 2 meter A to B USB cable, power plug, and 5 meter A to B mini-USB cable Compatible with SoftStep, 12 Step, QuNeo, QuNexus, and K-Mix. The Keith McMillen Instruments MIDI Expander is a must have add-on that enables you to control your MIDI world.