M-Audio Oxygen 49 MK4 USB MIDI Keyboard Controller
M-Audio
Oxygen 49 (MKV) | M-Audio
Amazon.com: M Audio Oxygen 49 IV | 49 Key USB/MIDI Keyboard With 8 Trigger Pads & A Full Consignment of Production/Performance Ready Controls : Musical Instruments
M-Audio Oxygen Pro 49 49-key Keyboard Controller | Sweetwater