SONY wireless earbuds, the WF-C510. I only tried them on once, so they are in almost new condition. There are no issues with sound quality or functionality (tested), but I am selling them because they didn't suit my preferences. Here are the main specifications of the product: * Up to 22 hours of playback (with the main unit and case) * Multipoint function * Supports ambient sound mode * Ultra-lightweight and compact: 4.6g for the main unit, 31g for the case * Easy operation with physical buttons * High-quality sound reproduction with DSEE (Digital Sound Enhancement Engine) * IPX4 water-resistant (safe for exercise and rainy days) * Single-ear use possible (either left or right) * Bluetooth 5.3 compatible * USB Type-C charging * Lightweight design for comfortable wear All accessories are included, and I will carefully pack them in the original box for shipping.