Sony WH-CH520 headphones, black color. The headphones are very clean, lightly used, and the box is available. Specifications in brief: Its battery is a champion, lasts for days without charging (up to 50 hours). Lightweight, comfortable, and doesn't bother the ears. You can connect it to two devices at the same time. The headphones have no issues, no scratches or anything else. Reason for selling: I don't use them much.