Akai APC20 Features:

• Designed in partnership with Ableton, mapped for Live, and fully customizable
• Clip Launch matrix with multicolor lighting displays current clip status
• No mapping required; every button and fader is pre-mapped
• Bidirectional hardware/software communication for visual feedback on APC20
• Solid, professional feel with rugged, metal chassis and premium controls
• Comes with Ableton Live Akai Professional APC Edition software
• Works with standalone editions of Ableton Live
• USB plug-and-play connection for Mac and PC

Includes:

• APC20 Ableton performance controller
  
• USB cable
  
• Power supply
  
• Software CD
  
• Quick start guide

Power supply: 12V 2.0A pin-positive, included
Communication: USB-MIDI with proprietary hardware/software handshake
Inputs: USB, Two assignable footswitch inputs

Minimum system requierments
Mac: G4 / Intel recommended, OS X 10.3.9 / 10.4+ recommended
PC: 1.5GHz, Windows XP or Vista, Windows-compatible sound card / ASIO driver support recommended
512MB RAM / 1GB recommended, QuickTime 6.5 or higher, DVD-ROM drive, USB port