Ⅰ. Bicycle Taillight Multi Lighting Modes USB Charging LED MTB Road Bike Flash Tail Rear Light For Cycling Seatpost Warning Lamps Ⅱ. -USB charging Ⅲ. -IPX2 waterproof Ⅳ. -Shell Material: Waterproof ABS Ⅴ. -Charging time: about 2 hours Ⅵ. -Working Time: 3-6 hours according to different using mode Ⅶ. -Easy to install, suitable for many sizes of handlebars or seatpost Ⅷ. -5 lighting modes style: Strong light, Weak Light, Flashing, warning lights, 100% lighting(as working video showing) Ⅸ. How to use ? Ⅹ. Open: click 1 time (0.5 second) Ⅺ. Close: 5 lighting modes style need press 3 seconds. 4 lighting modes style need press 1 second. Ⅻ. 750-ps - 0080203 ⅩⅢ. What should I if I don't receive my item? ⅩⅣ. Please contact us first, we will track your item. If the parcel was lost because of some reason, we will think over to full refund or resend it for you. ⅩⅤ. If the products have problems how to do it? ⅩⅥ. Please contact with us in time, we will solve it. ⅩⅦ. Specifications: ⅩⅧ. High brightness ⅩⅨ. Five modes ⅩⅩ. Long endurance ⅩⅪ. Small and light, portable ⅩⅫ. USB quick charging ⅩⅩⅢ. The shape is unique and distinctive ⅩⅩⅣ. Powerful inner core circuit board ⅩⅩⅤ. Ipx-2 life waterproof ⅩⅩⅥ. Easy to disassemble and assemble at any time ⅩⅩⅦ. Package Included: ⅩⅩⅧ. Tail lights * 1 ⅩⅩⅨ. Headlight straps *1 ⅩⅩⅩ. USB cable * 1 ⅩⅩⅪ. Packing box * 1