It is essential for cyclists to use USB rechargeable cycling lights 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. front and rear bicycle lights can be charged by USB cable by connecting to the computer, charger, or portable power bank, without frequently changing batteries, rechargeable light can save your time and energy; After being fully charged for about 2 to 3 hours, the light can run for 4 to 10 hours.