[Stable Bluetooth V5.3 Connection] Adopting the latest Bluetooth 5.3 technology and superior acoustic component, ensures faster and more stable connection. Boean wireless headphones up to 30ft Bluetooth range in the open space and 10ft in the obstacles space. [IPX7 Waterproof] Rain, sweat, and water splashes all happen, so be ready with waterproof earbuds, which are rated at IPX7 to withstand liquids during strenuous exercise and all-weather conditions. [Ergonomic Design for Sports] Ergonomic design provides a comfortable and secure fit that doesn’t protrude from your ears especially for Sports, Workout, Gym. Equipped with 4 pairs of ear caps to ensure your running headphones fit comfortably and noise cancelling in ear. Just move as you want. [Up to 16 Hours of Playtime] Equipped with improved polymer lithium battery, bluetooth headphones delivers 16 hours of superior audio performance / talk time, which gives you excellent experience of long endurance. [Stereo Sound Quality] Powered by 11mm dynamic driver and in-ear acoustic structure, wireless headphones presents a powerful and wide sound range, which makes the treble full of dynamics and the bass powerful.