Using Bluetooth 5.0 chip, it is more energy-efficient, has low latency and produces no noise, achieving stable and high-quality audio transmission. Adopting CVC intelligent noise reduction, ultra-sensitive anti-noise silicone microphone and windproof noise-canceling microphone cover to ensure call quality. 【3】 The product can connect two mobile phones simultaneously to control basic phone functions such as making and receiving calls and playing music; Automatically answer calls. If you don't want to answer, press the key to refuse or hang up, and then call again at the end of the line. 【4】 The product adopts a 1500mAh ultra-large-capacity polymer rechargeable lithium battery. Supports most smartphones to check the battery level display of the headset, allowing you to check the battery level anytime, anywhere at a glance; It can also be used while cycling and charged at the same time, achieving a balance between charging and use. 【5】 The product is designed with IP67 high waterproof rating, which is completely unchanged even when used in rainy or snowy weather. 【6】 The product adopts a large button design, with a reasonable layout and clear functional areas, ensuring quick and safe completion of cycling. Installation method: The product comes with two installation methods: clamp base and adhesive Velcro. The clamp base should be used first. The hard tube microphone is suitable for half-face helmets/flip face helmets/retro helmets. Soft wired microphone is suitable for full-face helmets/rally helmets/off-road helmets. 【9】 The product shell is made of ABS material, with a surface treated with rubber oil and a built-in silicone inner frame. It is deeply waterproof, sun-resistant and durable.