This is the Sennheiser IE 900, the flagship in-ear monitor from the renowned German audio brand Sennheiser. This high-end model boasts exceptional acoustic design with its unique "X3R technology," a high-quality aluminum housing, and impressive resolution and beautiful sound. ⸻ Product Condition • All accessories have the same serial number (authentic product) • Minor scratches on the main unit, but no impact on use or sound quality • Operation confirmed, sound output is normal for both left and right channels • Cables and accessories are in good condition • Used and stored in a non-smoking, pet-free environment ⸻ ■ Included Accessories (all genuine) • Carrying case • Detachable cable (MMCX) • Genuine 2.5mm balanced cable • Genuine 3.5mm unbalanced cable • Genuine 4.4mm balanced cable • Instruction manual set • Eartips (silicone/foam) ※ All items shown in the photos are included. The outer box has some scratches and minor dents, but the contents are not affected. ■ Key Features • Sennheiser's top-of-the-line IE 900 • High resolution and balanced sound quality thanks to X3R technology • Designed in Germany, manufactured in Ireland • Built-in resonator chamber to suppress distortion and masking • Para-aramid reinforced cable + Fidelity Plus MMCX connector • Adjustable ear hooks for a stable fit • Lightweight design (approx. 4g per side) for comfortable long-term use ■ Product Specifications • Model: SENNHEISER IE 900 • Connection method: Wired (MMCX, supports cable replacement) • Wearing style: Canal type • Color: Gray系 (Gray-ish) • Frequency response: 5Hz ～ 48,000Hz • Impedance: 18Ω • Plug: 2.5mm (4-pole, balanced) • Cable length: Approximately 1.25m • Weight: Approximately 4.0g (per side) • Total Harmonic Distortion (THD): 0.05% For those seeking high-quality earphones, or those who want to try the IE 900. Please feel free to ask any questions in the comments. Shipping • Shipping included / Secure anonymous shipping • Carefully packed and shipped within 24 hours This model is highly recommended for those seeking high sound quality. For those who don't mind minor scratches, this is an excellent value. Please consider this opportunity.