M-Audio MIDISPORT 1x1 Multiplatform USB MIDI Interface Fast, reliable, external MIDI solution for users of current Macintosh and Windows PC computers that have USB interface connectivity ports Includes 6-foot cable that simply connects to a USB port to provide 1 MIDI input and 1 MIDI out put port 16 MIDI Channels per port MIDI-activity indicators for each port Self-powered from USB (requires no external power supply)