Product Description (Final Version) Welcome to the world of high-end sound! I am offering the Sennheiser flagship IEM IE900. With its high resolution and natural sound, you can enjoy music as it is. ⸻ ✅ Condition ・Operation confirmed (no problems) ・MMCX terminals, cables, and housings are all in good condition ・No nozzle clogging ・Stored in a non-smoking, pet-free environment ・Minor scratches and small marks on the exterior (please check the photos) ※The photos are taken with magnification, so they appear more noticeable than they actually are. In reality, they are only visible when viewed up close under strong light. ・No impact on sound quality or operation ⸻ ✅ Accessories ・Original 2.5mm balanced cable ・Original 3.5mm unbalanced cable ・Original 4.4mm balanced cable ※No other accessories are included. ⸻ ✅ Operation Check Details ・Auditioned with iPhone 12 Pro / FiiO M11 ・Sound output is normal on both left and right sides ・20Hz〜20kHz, no distortion or noise, normal phase ・No disconnection or poor contact during cable operation ・DC resistance: L 016.6Ω / R 016.6Ω → No abnormalities ⸻ ⚠️ Notes ・Please refrain from purchasing if you are sensitive to used items ・Price negotiation is possible (significant discounts are not possible) ・Shipped within 24 hours of payment confirmation ⸻ Professionally inspected and anonymously shipped All accessories and inspection results are shown in the photos. ⸻ Recommended for those looking for high-quality earphones. Instant purchase welcome - first come, first served!