M-Audio MIDISPORT 1x1 | 1-in/1-out USB-Powered MIDI Interface (16 Channels) 1-in/1-out MIDI interface, compact and lightweight for mobile or desktop use Includes 6-foot cable that connects to a USB port to provide 1 MIDI input and 1 MIDI output port 16 MIDI channels per port LED activity indicators for each port Self-powered from USB (requires no external power supply)