I am selling a pair of headphones that I purchased from a domestic specialty store, but have rarely used, so they have been stored for a long time. Includes original box and all accessories. There is no receipt. The serial number has been processed in the image. Authenticity has been confirmed via QR code. Sound output has been confirmed, and there are no operational issues. I haven't used them much, so they are in good condition. As a bonus, I will include a genuine 3.5mm short cable (1.2m), HD5X8-CABLE. Model Number: HD598 Manufacturer: Sennheiser Type: Open-back headphones Frequency Response: 12Hz～38.5kHz Impedance: 50Ω Sensitivity: 112dB Weight: 246g Cable Length: 3.0m (Single-sided, Removable) Plug: 6.3φ stereo Please understand that I will not negotiate on price. I will block anyone who insists on a price reduction. Please refrain from purchasing if you are overly sensitive, as these have been stored at home. Please only consider purchasing if you can conduct a transaction with common sense. I do not wish to do business with those who cannot make immediate payment and provide a receipt evaluation within the day after arrival, so please refrain from doing so. Returns are not accepted. *I may also list this item on other sites, so please understand that I may cancel the sale depending on the timing. I cannot ship on Wednesdays.