Double bracket installation: it can be hung behind the bow, or the seat post can be installed on it, two ways for you to choose Vibration Sensing: In smart mode, the light will automatically turn off without vibration for about 30 seconds, and the light will automatically turn on when the vibration is felt 4 kinds of lighting modes: slow flash, breathing flash, burst flash, always bright Four modes can be switched with one key Smart Brake Sensing: When the lights sense the brakes during riding, they will light up for 3 seconds to warn the vehicles behind ABS+PC shell: light weight but stronger, able to resist impact, wear and corrosion resistance Type-C charging + 260MAH battery: meet daily battery life IPX6 level waterproof and dustproof: not afraid of the impact of bad air off on the lights (do not soak in water for a long time)