I used this for about three months. I am selling it because I will be using something else. Operation has been confirmed. Please only purchase if you understand that this is a used item. Everything in the photos is included. This is a premium headphone developed based on Fostex's flagship open-back headphone, the TH909. It features a housing carved from high-quality black walnut solid wood, a proprietary bio-dynamic diaphragm driver unit, and integrated aluminum etching parts. Based on an open design, it is meticulously tuned for acoustics and carefully assembled one by one, offering a new premium headphone experience. Key Features ● Equipped with the company's own driver unit boasting a magnetic flux density of 1.5 Tesla from the TH900 series. The TH808's original acoustic tuning achieves delicate, high-resolution sound quality across a wide frequency range. The company's proprietary driver unit, developed with years of accumulated technology, uses a bio-cellulose fiber and other fibers in the diaphragm under optimal conditions to achieve low density, high Young's modulus, and high internal loss. The neodymium magnet's repulsive magnetic circuit is employed, with a low-distortion, ultra-powerful magnetic circuit of 1.5 Tesla magnetic flux density and the free edge's excellent linearity, achieving excellent response and a vast dynamic range across all frequencies. In addition to delicate and high-resolution mid-high frequency reproduction, it faithfully reproduces the low-mid frequencies with large amplitudes. ● Unique open-back housing made of black walnut solid wood and aluminum. The housing carved from high-quality black walnut solid wood features a unique design with double-layered aluminum etching parts in the open-back openings, which change appearance depending on the light and angle. The opening ratio, meticulous fine-tuning of each internal part, and the resonance of the black walnut solid wood combine to reproduce a natural sound field that is comfortable to listen to and reduces listening fatigue. ● Includes the TH808 original high-purity OFC unbalanced cable. Includes the TH808 original high-purity OFC (Oxygen Free Copper) unbalanced cable, which eliminates impurities to the utmost extent and enhances transmission capacity. 5@0@1