[ HIGH BRIGHTNESS & 5 MODES ]: 8 LED bike lights,100 lumens.5 Light Modes:Normal Mode, Burst Flash,SOS, Running Light, Jumping Flash. Bike Tail Light suitable for use in a variety of environments.[ USB CHARGING ]: Rechargeable bike tail light is charged through a USB cable,easy to charge.[ LONG BATTERY LIFE ]: Rear bike light 5-6 hours in constant light mode, about 6 hours of flashing, and 6-7 hours of flashing.Bike lights for night riding.[ IPX4 WATERPROOF ]: This LED bicycle light can maintain a normal lighting mode in rain, fog, and snow. Must-have for cyclists.[ IPX4 WATERPROOF ]: This warning light can maintain a normal lighting mode in rain, fog, and snow. It has a highly airtight structure, but it should be avoided from falling into the water or immersed in the water for a long time.. [ EASY TO USE ]:This LED bike rear light can not only be easily installed on your bicycle, skateboard, stroller,scooter,it can also be hung on running gear, dog collars, reflective vests, backpacks, belts, etc.