Featuring Bluetooth 5.0, these earbuds power on and sync automatically as soon as you open the charging case. The case not only serves as a protective storage solution but also functions as a power bank, conveniently rechargeable with the included USB-A-to-Type-C cable. With a handy LED display on the case, you can easily monitor the battery percentage for both the case and the earbuds. Once fully charged, the 400mAh battery can recharge the earbuds three times from 0-100%. Enjoy over 4 hours of playback at maximum volume on a single charge, making these earbuds an essential companion for anyone needing reliable audio throughout the day. Plus, with their ergonomic design and comfortable silicone tips, they stay securely in place no matter where your adventures take you!