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
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M-Audio Oxygen Pro 49 USB MIDI Keyboard Controller | zZounds
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Amazon.com: M-Audio Oxygen (MKV) – 49 Key USB MIDI Keyboard Controller with Beat Pads, Smart Chord & Scale Modes, Arpeggiator and Software Suite Included : Musical Instruments
M-Audio - Oxygen 61 IV, 61-Key USB MIDI Controller