DCTreasures-Bicycle Light USB Rechargable Bike Light Led Lamp Flashlight Tail Rear Cycling Lights for MTB Seatpost 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.