Tough, simple, reliablethese incredibly Nima lights may be diminutive, but they really pack a punch! Small enough to be a back-up, powerful enough to really get noticed & Cateye built, which means they wont let you down. Superbly stylish front & rear lights with easy attachment. Will fit to seat post, handlebar, bags, helmet etc. 180 degree visibility through light permeable housing Click-tec switch for ease & increased water resistance Simple O Ring band mount 4 modes: Constant / Flash / Rapid / Pulse Runtimes: C: 15hrs / F: 80hrs