About this item Comfortable and Flexible Earhook Designed for Sport: Unlike ordinary in-ear headphones, these wireless headphones feature soft, flexible, and secure-fit ear hooks that ensure a secure fit during intense workouts. The silicone ear hooks and ergonomic design keep the sport earbuds comfortable while exercising, running, and engaging in outdoor activities. Comes with three pairs of silicone ear tips (S, M, L) to accommodate a wider range of ear sizes. Bluetooth 5.3 Technology and Powerful Compatibility: Utilizing advanced Bluetooth V5.3, these headphones support HSP HFP A2DP AVRCP for an exceptional audio experience with faster transmission speed, stronger connection stability, and an extended Bluetooth range of up to 15m. They easily pair with smart devices running Android 4.4 or iOS 8.0 and above, as well as Bluetooth 4.0 and above. 50 Hrs Playtime and USB-C Fast Charge: The true wireless earbuds automatically charge in the case and provide up to 8-10 hours of music time,