`- Great supplementary USB chargeable lights for on bike or helmet usage. Tool free installation\n- Dust and water resistance rated to IP54 standard \n- Side cutouts provide 270 degrees of visibility\n- Up to 22 hours run time. Steady, Courtesy, and Superflash modes\n- Includes: rubber strap mount compatible with almost all bars and seatposts and USB charger cable\n- Available as a set or individually