SG-BU50 one of USB rechargeable bicycle lights with waterproof design. Its compact structure and light-weight design makes it very portable and convenient to carry in pocket. The new light is also compatible with the versatile GoPro mounting system. With GoPro mounts, this compact light could be widely used for outdoor activities including night biking, skiing, hiking, jogging,etc. It provides all-in-one illumination solution for outdoor sports.