Truly-wireless headphones Let you listen to your favorite tracks, so you won't be held back by wires. Rechargeable battery 6 hours playtime in the earbuds and 34 and more in the charging case. Sweat-resistant Provides protection from sweat, so you can easily wear headphones while working out. Built-in microphone Enables simple hands-free chatting via a compatible device. Bluetooth interface Earbuds automatically turn on and connect with Bluetooth 5. In-ear design Fits securely with 4 tip sizes including Cloud Foam tips for in-ear seal.