The CME Xkey 37-Key Mobile MIDI Controller slims down the USB keyboard format to a package that's lighter than a tablet computer and ready for transport anywhere. Clocking in at around a pound and a half, the 37 full-size keys are built with 128-point velocity-sensitive precision and polyphonic aftertouch for a studio-quality playing experience. One of the most compact controllers in production, the Xkey 37 makes creating music anywhere easier than ever.