Check the listing for details. M-Audio OXYGEN25 USB MIDI Controller with Smart Controls Untested. Color: Black, Condition: Used. Listed at 52.99 USD. No Cable untested. This M-Audio OXYGEN25 USB MIDI Controller with Smart Controls is a great addition to any musician or producer's setup. It allows for easy control over your music and instruments, making it perfect for both beginners and professionals alike. The sleek black design is sure to match any setup and the brand M-Audio is known for their high-quality products. This keyboard controller is ideal for those looking to take their music to the next level. The Smart Controls make it easy to navigate and experiment with different sounds, while the USB connectivity ensures a reliable and seamless performance. Whether you're a seasoned musician or just starting out, this MIDI controller is a must-have for any setup. 3