IP7 Waterproof and One-Step Pairing: Waterproof earbuds are made of IP7 high quality waterproof materials, multi process design headphone body, high specification waterproof test. When taken out from the charging case, wireless bluetooth earbuds will pair automatically and reconnect the most recently connected bluetooth device, allowing you to use them with no hassle. (NOTE: Please wipe the metal parts of the headphones with a dry cloth after exercise to avoid corrosion by sweat.). Immersive Sound and Crystal Clear Call: A tiny yet powerful 10mm driver unit sits inside the earbuds, which makes the bass more punchy and the midrange full and textured. The unique stereo design gives you the perfect sound, and you can feel the more realistic music. Whether you are indoors or outdoors, you can enjoy a musical feast! ENC noise cancelling technology filters out environmental noise, allowing you to enjoy crystal clear calls, as if you are communicating face to face with others. 50 Hrs Playtime and USB-C Fast Charge: The true wireless earbuds can be automatically charged in the case, and the earbuds provide up to 8-10 hrs of music time, while the portable charging case can extend it to 50 hrs. Bluetooth earphones feature a dual LED digital display that provides real-time battery status. With type-C quick charge, it only takes 2hrs to charge the case. (NOTE: Please fully charge it for the first use. If used for calls, the earbuds only lasts -3-4 hrs.). Bluetooth 5.3 Technology and Powerful Compatibility: Adopting advanced Bluetooth V5.3, bluetooth headphones support HSP HFP A2DP AVRCP, which offer you an unparalleled audio experience with faster transmission speed, stronger connection stability, and longer range of bluetooth(Up to 15m). Wireless earphones pair with smart devices via Bluetooth, which works with Android 4.4 or iOS 8.0 and above, Bluetooth 4. 0 and above. Choose the Poounur wireless earbuds to worry-free today. Comfortable and Flexible Earhook Designed for Sport: Unlike ordinary in ear headphones, Poounur H9 wireless headphones are designed with soft, flexible and secure fit ear hooks aimed at fully fitting your ears without falling out even for intense workouts. The secure-fitting silicone ear hooks and ergonomic design ensure your sport earbuds stay comfortably during exercise, running and other outdoor activities. With 3 pairs of silicone ear tips (S, M, L) to fit a wider range of ears.