M-Audio Keystation 88es Details:
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 that's velocity sensitive to convey all the nuances of your playing to your computer and most popular soft synths and sequencing software.

• 88-key controller ideal for performance, computer recording and education
  The Keystation 88es is an 88-key, semi-weighted action USB MIDI controller with velocity sensitivity that's perfect for performance, computer-based recording, and education. The Keystation 88es offers space-age design and rugged construction and delivers incredible feel and stability. Plus, it's all in a package that is light enough for pros to carry under one arm, yet elegant enough for home environments. At just 22 lb., the Keystation 88es is equally at home on stage and in the studio.
• Pitch and modulation wheels plus assignable slider and buttons for MIDI control
  The Keystation 88es includes pitch and modulation wheels for controlling parameters on an external module or a soft synth. In addition, an assignable slider and buttons make it a great controller for playing and programming synths, samplers, drum sounds and more.
• USB convenience and compatibility with virtually all Windows and Mac OS X programs
  For computer music use, you only need one simple USB cable to connect the Keystation 88es. The USB cable even provides power to the keyboard! Its USB MIDI interface connects you to sequencers and soft synths. And a separate MIDI Out jack lets you route MIDI data from either the Keystation 88es or your computer to an external sound module or drum machine. It's class-compliant with Windows XP and Mac OS X for easy plug-and-play setup with no drivers required.
• Includes bundled software
  To get you started making music with your Keystation 88es right away, M-Audio includes a bundle of useful studio software, including soft synths and more. With your Keystation 88es andthe software you'll be exploring sounds within minutes of opening the box!

M-Audio Keystation 88es Features:

• 88-note velocity-sensitive, semi-weighted action
• Pitch bend and modulation wheels
• Volume/assignable control slider
• Advanced function button for programming
• Sustain and expression pedal inputs (pedals sold separately)
• Assignable data up/down buttons
• Built-in USB MIDI interface
• MIDI Out jack routes MIDI signals from keyboard or computer to external devices
• Powered via USB or 9VDC power adapter (sold separately)
• Mac OS X and Windows XP class compliant for plug-and-play
• Includes studio software