The Pearl K708 Qunexus Is A Vividly Illuminated Keyboard Controller That Is Both Fun For Beginners And A Must Have For Professionals. 25 Touch-sensitive Keys Detect Finger Pressure, Velocity, And Tilt, Giving You Unprecedented Musical Control. Blue And White Led Illumination With 16 Levels Of Brightness Give The User Valuable Feedback. Use The Toggle/hold Mode To Create Your Own Step Sequencer Or Arpeggiator With Led Feedback. Qunexus Is The First Keyboard Controller To Unite Four Generations Of Synthesis Control: Midi, Control Voltage, Osc And Usb. Midi Expander Required For 5-pin Midi Connection (sold Separately).