Sony MUC-B12SM1 Headphone Upgrade Cable The Sony genuine high-end upgrade cable MUC-B12SM1. It is 1.2 meters long and uses high-purity oxygen-free copper (OFC) conductors to ensure signal transmission efficiency and sound resolution. The gold-plated plug design provides a stable connection and low distortion, bringing out a more precise sound field and detail. This product is positioned in Sony's high-end accessory series and is ideal for discerning users seeking improved sound quality. ------------------- Originally purchased at e☆イヤホン Akihabara store. I tried it only once, but it didn't meet my needs, so I am selling it. The product is in very good condition and has no problems in use. I also keep the receipt, and you can continue to receive after-sales service from the same store.