A. This bicycle speedometer headlamp is a good piece of equipment for cycling enthusiasts. It combines multiple functions. Not only can it be used as a bicycle flashlight for illumination, but it also has a wireless speedometer function, adding more convenience and fun to your cycling. B. This speedometer headlamp has good waterproof performance. Whether you are cycling in the rain or using it in a humid environment, it can work stably. So you don't have to worry about the impact of weather conditions on its use. In addition, it uses a USB charging method, making the charging process simple and convenient, and it can always maintain enough power to meet your cycling needs. C. It is cleverly designed and its appearance design has a patent. It has an overall aesthetic feeling and stands out among many similar products. Also, it is equipped with a horn, which can play a role when necessary. D. It has a variety of matching options to meet different cycling scenarios and personal preferences. It has obtained foreign trade export certification and quality inspection reports, ensuring its quality and accompanying you on every wonderful cycling journey.