MIDI Keyboard MIDI M-Audio Oxygen 49 Mk IV - 300gel. Used little, no problems at all, excellent condition. Suitable for amateur home playing or professional studio. The device is equipped with a volume control, 49 full-size keys spanning four octaves, 8 rubberized trigger pads, and 9 assignable faders. Comfortable operation is facilitated by eight assignable knobs and dedicated transport buttons. Weighs only 2.9 kg and measures 81.4x9.4x24.3 cm, allowing you to create quality music on the go. The keyboard features a MIDI input, pedal jack, and USB port power interface. The device is complemented by convenient buttons and rotary controls.