Keyboard 49-note velocity
pitch bend and modulation
volume slider / control
advanced function button for programming
Sustain pedal input
Octave buttons + / - to select the size of the keyboard
separate MIDI out jack routes MIDI signals from your computer to control external devices
powered by USB or 9V DC power supply (not supplied)
is also a standalone USB MIDI interface
feature "plug and play" with native support for Windows XP and Mac OS X
drivers included for Mac OS 9.1 (or higher) and Windows 95/98/ME/2000
The driver for vista is available on the website of M-Audio.

UTILIZATION

The touch is nice for the work of arrangement, composition for the velocity is not really to go and nothing beats the feel of a piano.
The configuration is as simple as selecting MIDI channels. It is recognized without problems.
The manual is probably very clear but I have so far not had need.

OVERALL OPINION

I use it for 8 months and what I like most is that it is USB and power by the latter making it very portable so convenient with my laptop and my edirol UA25.
I try a Korg of the same type before but € 70 more expensive. The Keystation does very well with a great value for money.
This choice I would do without hesitation.