The keith mcmillen k board pro 4 is a 4 octave touch sensitive midi keyboard controller with advanced smart fabric sensor technology providing an expanded range of expressive possibilities'. '.strtoupper('e')ach key outputs touch sensitive xyz position data and can be mapped to anything allowing you to play expressively in real time with every nuance you would expect from an acoustic instrument'. '.strtoupper('i')deal for both on stage and in the studio the k board pro 4 features 4 touch sensitive sliders that can also be mapped to anything such as octave vibrato depth or preset allowing you to quickly switch between settings'. '.strtoupper('i')t is mpe compatible allowing you to play your soft synths or hardware synths and its durable design features no moving parts making the k board pro 4 a portable solution for the working musician.