88-note velocity-sensitive, semi-weighted action
 -built-in USB MIDI interface w/ MIDI out jack
 -powered via USB or 9VDC
 -class-compliant with Windows XP, Vista (32 bit), and Mac OS X
 -includes Ableton Live Lite music production software, so you can make music right away

If you appreciate the full range of a piano keyboard in a lightweight package, the 88-note Keystation 88es is for you. You get great-feeling, semi-weighted action thats velocity sensitive to convey all the nuances of your playing to your computer and most popular music education and studio software. The pitch and modulation wheels plus slider and buttons make it a great controller for playing and programming synths, samplers, drum sounds and more. At just 22 lbs., the Keystation 88es is equally at home on stage and in the studio. Class compliancy with Windows XP, Vista (32 bit), and Mac OS X ensures easy plug-and-play setup. Its even bus-powered, so one simple USB cable is the only connection you need.

Compatibility
 MME and Mac OS X Core MIDI
 Minimum System Requirements (PC)
 -Windows 98SE / Me / 2000 (SP4) / XP (SP2)* / Windows Vista 32 , 64bit (SP2) / Win7 32, 64bit
 -* Home and Professional Edition only. Windows Media Center Edition is not supported.
 -** M-Audio suggests you also check the minimum system requirements for your software, as they may be greater than the above.
 -Minimum System Requirements (Mac)
 -G4* 500MHz
 -OS X 10.2.6, 10.3.6, 10.4, 10.5.1
 -256MB RAM
 -* native USB port required; G3/G4 accelerator cards not supported
 -** M-Audio suggests you also check the minimum system requirements for your software, as they may be greater than the above.