Rechargeable light: front and rear bicycle light can be charged by USB cable by connected to the computer, charger or portable power bank, without frequently changing batteries, rechargeable light can save your time and energy; After fully charged for about 2 to 3 hours, the light can run for 4 to 10 hours. Warning and reminding light: it is essential for cyclist to use USB rechargeable cycling light in the dark or foggy morning to ensure their clear view, red light commonly serves as bike taillight while white light serves as headlight, the rays emitted by them are bright and obvious to catch others' attention. Easy to install: there is no other tool needed to help to install flashing safety bike light, its 2 rubber straps can fix it well; The bike light can be mounted on many places, such as bike frame, crossbar, seat pole, also suitable for placed on backpack, belt, reflective vest, etc. Waterproof feature: bicycle rear light is able to use in rainy days, because it can perform well even touched by water, presenting the same illumination as the common days did.