In commemoration of M-Audio’s 20th anniversary, the Midiman MIDISPORT 4x4 Anniversary Edition gives the popular multi-port USB MIDI interface an updated new look. MIDISPORT 4x4 Anniversary Edition addresses a total of 64 x 64 discrete channels of MIDI I/O via USB, allowing you to simultaneously connect a variety of MIDI devices. Bus-powered architecture provides the option of totally mobile operation.