USB rechargeable and long - term use time-USB rechargeable lets you say goodbye to the battery. A full charge only takes 3 to 5 hours (depending on your charging voltage). The built-in smart IC can prevent over-charging or over - discharging and extend battery life.Strict safety protection-waterproof headlights can withstand all bad weather, allowing you to see clearly, improving visibility and safety. The 360 rotatable bracket allows the bicycle light to shine in any direction you want.Quick release - you can install the headlights almost anywhere (mountain/children/street bikes, strollers, wheelchairs, motorcycles, scooters, electric bicycles) with almost no tools, and remove them in 1 second Come down and become a compact but powerful emergency flashlight. Put it in the car, basement, attic and first aid kit.Multifunctional - use it in situations such as running, jogging, hiking, camping, biking, changing tires, night family, children's activities, power outages, etc. Easy to use - can be used at any time in any weather. Adjustable, light and breathable, no need to worry about batteries. Suitable for all kinds of people.