The M-Audio Oxygen Pro 49 is a professional-grade USB MIDI-keyboard designed for musicians and producers looking for a reliable and high-quality keyboard controller. With its 49 keys and durable construction, this keyboard offers a sleek and intuitive interface for creating music and managing MIDI data. The M-Audio brand is well-known for producing top-notch musical equipment, making the Oxygen Pro 49 a popular choice for those in the market for a professional MIDI-keyboard solution.