These wireless earphones are widely compatible with iOS, Android, Windows smartphones, tablets, etc. Brand new, unused, and operation has not been confirmed. ⚠️Basically, they will be shipped without the box. ⚠️ If you want the box, it will be an additional 300 yen. Please comment before purchasing ☆ ✅ Industry-leading Bluetooth 5.4 Equipped with the latest Bluetooth 5.4. The performance of these Bluetooth earphones has been upgraded, with significant improvements in communication distance, speed, and stability compared to previous models. In addition, the latest Bluetooth 5.4 chip is adopted, resulting in extremely low memory usage and low power consumption, saving energy and extending playback time. The earphones have 4 times the data transmission speed and 10 times the data transfer capacity, minimizing signal loss, sound skipping, sound distortion, and delay of conventional Bluetooth earphones, and enhancing penetration. ✅ Long Playback Time: 50 Hours of Music & LED Display These wireless earphones can play for up to 8 hours on a single charge, and up to 50 hours when used with the charging case equipped with an LED display. ✅ Automatic Pairing & Easy Operation After pairing these earphones with your smartphone for the first time, they will automatically pair with your smartphone when you take them out of the charging case the next time you use them. ✅ Comfortable Fit & Super Reliable Service Designed for Asians, they fit any ear perfectly! With an ultra-lightweight design of only 4g per ear, they minimize the burden on your ears, providing a natural and comfortable fit that you'll forget you're wearing even after long hours.