Edirol PCR-300 Midi Keyboard Controller 50 Assignable Controllers - The new PCR Series offers all the controls of previous models Assignable Controls & 18 Velocity Pads - The new PCR Series has all the existing controls of the previous range Unique Crossfader & Long-Throw Sliders - The new Crossfader allows control of two parameters at the same time High-Quality Keyboards with Aftertouch - The new ultra-sensitive keyboards provide a wider dynamic range under the player's fingertips Intelligent Dynamic Mapping and Editor Software - Dynamic Mapping allows the PCR to automatically assign its physical controls