Multi Lighting Modes Bicycle Light USB Charge Led Bike Light Flash Tail Rear Bicycle Lights for Mountains Bike

Mounting Placement: Seatpost Power Supply: USB Power supply: USB Waterproof: IPX2 waterproof bicycle accessories -USB charging -IPX2 waterproof -Shell Material: Waterproof ABS -Charging time: about 2 hours -Working Time: 3-6 hours according to different using mode -Easy to install, suitable for many sizes of handlebars or seatpost -5 lighting modes style: Strong light, Weak Light, Flashing, warning lights, 100% lighting(as working video showing) -4   lighting modes style:   Strong light, Weak Light, Flashing, warning lights   (as working video showing  )  How to use it? Open: click 1 time (0.5 second) Close: 5 lighting modes style need press 3 seconds. 4   lighting modes style just need press 1 second.