Features: 1Bluetooth V5.1 technology: can provide you with an unparalleled audio experience, faster transmission speed, stronger connection stability and longer Bluetooth range. 2CVC8.0 noise reduction technology: It can filter environmental noise, allowing you to enjoy clear calls, just like talking face to face with others. Hi-Fi sound quality, deep bass and 3D surround sound, it feels like you are listening to a concert live, providing you with realistic sound. 3IP7 waterproof protects sports wireless headphones from water drop or sweat damage. 4Sports design: The safety-fitting silicone ear hooks and ergonomic design ensure that your sports earplugs remain comfortable and fixed during sports, running, jogging, hiking and other outdoor activities. 542 hours of play time & USB-C fast charging] The true wireless headset can be automatically charged in the protective case, the earplugs provide up to 5 hours of listening or talking time, and the portable charging box can be extended to 42 hours. Note: Please fully charge the battery when you first use it. )