[Comfortable to wear] This open-ear headset is comfortable and lightweight to wear, with an ear-hook design, which makes it more stable to wear and not easy to fall off during exercise.[Long battery life] This open-ear headset has a built-in large-capacity battery, which can be used for 4 hours on a single charge. When used with a charging case, the total battery life is 15 hours, which can meet your daily use needs.[Clear calls with microphone] This open-ear headset has a built-in high-definition microphone for accurate sound pickup; with a Bluetooth 5.3 chip, your calls are smoother and clearer, and clear communication is like face-to-face communication[Waterproof design] This open-ear headset has IPX5 waterproof performance, no fear of sweating, daily use of water, and rain, making your exercise more enjoyable and rainy travel more fearless.