Bicycle Taillight Multi Lighting Modes USB Charging LED MTB Road Bike Flash Tail Rear Light For Cycling Seatpost Warning Lamps - 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: Strong light, Weak Light, Flashing, warning lights, 100% lighting (as working video showing) How to use? Open: click 1 time (0.5 second) Close: 5 lighting modes require press 3 seconds, 4 lighting modes require press 1 second. High brightness, safer Five modes, follow one's incline Long endurance, sufficient power supply Small and light, portable USB quick charging Unique and distinctive shape Powerful inner core circuit board IPX-2 life waterproof Easy to disassemble and assemble at any time Package Included: Tail lights * 1 Headlight straps * 1 USB cable * 1 Packing box * 1