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 modes - Easy to install, suitable for many sizes of handlebars or seat posts - 5 lighting modes: Strong light, Weak light, Flashing, Warning lights, 100% lighting (as shown in working video) How to use? Open: Click 1 time (0.5 second) Close: For 5 lighting modes, press and hold for 3 seconds. For 4 lighting modes, press and hold for 1 second. High brightness, safer Five modes, suitable for various riding conditions Long endurance, sufficient power supply Small and light, portable USB quick charging Unique and distinctive design Powerful inner core circuit board IPX2 water-resistant Easy to disassemble and assemble Package Included: Tail light * 1 Headlight strap * 1 USB cable * 1 Packing box * 1