A. USB charging B. IPX2 waterproof C. Shell Material: Waterproof ABS D. Charging time: about 2 hours E. Working Time: 3-6 hours according to different using mode F. Easy to install, suitable for many sizes of handlebars or seatpost G. 5 lighting modes style: Strong light, Weak Light, Flashing, warning lights, 100% lighting(as working video showing) H. How to use it? I. Open: click 1 time (0.5 second) J. Close: 5 lighting modes style need press 3 seconds. 4 lighting modes style just need press 1 second. K. 750-ps - 0080203 L. Wholesalers and retailers are welcomed. M. For wholesale,we will offer discount or free shipping method which only takes short time to arrive. N. If you are a retailer and wanna make your own business, we could send the goods to your customers directly and won't leave any information about us if you'd like to. O. What should I do if I don't receive my item? P. 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. We are honest seller, so don't worry. Q. If the products have problems how to do it? R. Please contact with us in time, we will solve it. Don't leave any bad review firstly, that can not solve any problem. S. Specifications: T. High brightness, safer U. Five modes, follow one's incline V. Long endurance, sufficient power supply W. Small and light, portable X. USB quick charging Y. The shape is unique and distinctive Z. Powerful inner core circuit board AA. Ipx-2 life waterproof AB. Easy to disassemble and assemble at any time AC. Package Included: AD. Tail lights * 1 AE. Headlight straps *1 AF. USB cable * 1 AG. Packing box * 1