beyerdynamic DT 900 PRO X open-back headphones, 48Ω. These are open-back monitor headphones featuring the newly developed STELLAR.45 driver with an impedance of 48Ω, making them suitable for a wide range of applications with any device. They further refine the high-quality sound of beyerdynamic, highly regarded by engineers and musicians worldwide, reproducing a more faithful and deep bass, and natural, clear highs. The headphone structure has also been revised, improving durability. Purchased new from Soundhouse in March 2024, and used only at home in a non-smoking environment. There are no particular issues with use, and there are no noticeable stains or damage. As shown in images 1 & 2, the box, instruction manual, cables, and carrying case are all included. Thank you for your consideration.