The Midi Port is a convenient USB MIDI Interface for PC and MAC Computer. It is fully optimized with Windows XP and MAC OS X. With the MidiPort, you can obtain perfect timing performance at an extremely affordable price. So just plug and play! The MidiPort USB MIDI Interface has the following features: MIDI Interface (16X16 MIDI channels) With high-speed connection to equipped PC or Mac computers Windows XP Plug and Play and no driver installation required No IRQ, I/O Address or DMA channel setup Perfect MIDI Timing MIDI-In and MIDI-Out activity indicators Self-powered, requires no external power supply Features Standard USB MIDI cable, optimized for Windows XP/Vista(32bit) and Mac OS X 1-In/1-Out 16 MIDI channels Perfect MIDI timing Compact and portable design True plug-and-play installation; no driver required LED displays for power, MIDI & USB signals SystemRequirement For PC - WindowXP operating system - Intel Celeron 366MHz CPUor equivalent AMD CPU - One available USB port - More than 64MB of RAM For MAC - MACOS 10.2 or later only - Macintosh with G3 or better processor (Except the original - PowerBook G3) - One available USB port - More than 64MB of RAM