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.