①. Bicycle Taillight Multi Lighting Modes USB Charging LED MTB Road Bike Flash Tail Rear Light For Cycling Seatpost Warning Lamps ②. -USB charging ③. -IPX2 waterproof ④. -Shell Material: Waterproof ABS ⑤. -Charging time: about 2 hours ⑥. -Working Time: 3-6 hours according to different using mode ⑦. -Easy to install, suitable for many sizes of handlebars or seatpost ⑧. -5 lighting modes style: Strong light, Weak Light, Flashing, warning lights, 100% lighting(as working video showing) ⑨. How to use ? ⑩. Open: click 1 time (0.5 second) ⑪. Close: 5 lighting modes style need press 3 seconds. 4 lighting modes style need press 1 second. ⑫. 750-ps - 0080203 ⑬. What should I if I don't receive my item? ⑭. 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. ⑮. If the products have problems how to do it? ⑯. Please contact with us in time, we will solve it. ⑰. Specifications: ⑱. High brightness, safer ⑲. Five modes, follow one's incline ⑳. Long endurance, sufficient power supply ㉑. Small and light, portable ㉒. USB quick charging ㉓. The shape is unique and distinctive ㉔. Powerful inner core circuit board ㉕. Ipx-2 life waterproof ㉖. Easy to disassemble and assemble at any time ㉗. Package Included: ㉘. Tail lights * 1 ㉙. Headlight straps *1 ㉚. USB cable * 1 ㉛. Packing box * 1