Purchased in the spring of 2021. It has been opened, but only for operational testing and is unused. It works perfectly, is in beautiful condition with no scratches. All accessories are unused and complete. The box has some stains as shown in the photos. Orders will generally be shipped on the same day. We take care to package items neatly so you can receive them with satisfaction. Sterilized and disinfected. We may change from Rakuraku Mercari delivery to Yu-Yu Mercari delivery. If you prefer Rakuraku Mercari delivery, please let us know in the comments. We offer a 100 yen discount to those who follow us. Please let us know in the comments. Thank you. For many years, we have been pursuing wireless earphones that combine new designs and high performance. Wireless earphones equipped with industry-leading performance and appearance finally appeared in 2021! [Newly developed Airoha "1536u technology"] These Bluetooth earphones use the newly developed Airoha "1536u" chip, which reduces delays and sound skipping compared to conventional models, improving stability. You can comfortably enjoy not only music but also games and videos. Stable communication is achieved even in crowded trains and other places where radio waves are frequently transmitted. In addition, with the new TWS technology, the wireless earphones are independent on the left and right sides, allowing you to easily switch between using either earphone independently or using both ears without having to designate one as the master unit. [Long-lasting playback & Hi-Fi high-quality sound] With a battery that allows for approximately 6 hours of music playback on a full charge, and approximately 36 hours of use with the included charging case. Recommended for those who want to use completely wireless earphones on long trips or business trips. (※ Playback time varies depending on volume, content being played, and usage environment). These are high-quality wireless earphones that can play high-quality sound. Equipped with a 13mm liquid crystal polymer composite diaphragm, pure sound signals are transmitted at high speed, allowing you to experience clear high frequencies, rich mid-range, and powerful deep bass with balanced and clear sound quality. It's like being in a live music venue. The waterproof performance is IPX7, which prevents water from entering, and is waterproof to protect the earphones from washing, sweat, water splashes, sports, and light rain, allowing you to enjoy music for a long time even if you sweat while running.