Sennheiser IE 600 High-End Wired Earphones, Complete Accessories, Authentic Product This product has undergone professional inspection and has been confirmed to be in top condition in terms of appearance, operation, and sound quality. Impedance measurements and channel balance test results are also excellent. You can enjoy the best sound quality immediately after purchase. ⸻ Product Condition • All accessories have the same serial number (authentic product) • Operation confirmed, both left and right sides produce sound normally • Disinfected and cleaned with 99.5% ethanol • Stored in a non-smoking, pet-free environment • Overall in good condition with no noticeable scratches, but please consider this a used item Full set of accessories • Outer box • Instruction manual • MMCX cable • 3.5mm unbalanced cable • 4.4mm balanced cable • Various size ear tips (foam/silicone) • Dedicated carrying case ⸻ Appearance Condition • Housing: No scratches, dents, or discoloration • MMCX connectors: No wear • Cables: No breaks, tears, or rust ⸻ Operation and Sound Quality Check Results • Impedance measurement: R = 16.6Ω / L = 16.6Ω (within specifications, no left/right difference) • Frequency sweep test (20Hz-20kHz): No distortion or noise • High frequencies: Clear and not harsh • Mid frequencies: Vocals and instrument sounds are clear • Low frequencies: Stable without muddiness Shipping • Shipping included / Secure anonymous shipping • Carefully packed and shipped within 24 hours This model is highly recommended for those seeking high-quality sound. For those who don't mind minor scratches, this is an excellent value. Please consider this opportunity.