Ultrabright Bike Light, Ugoe Tb05-01,water Resistentheadlight, Compatible with All Bike Types Li-ion Battery Pack SUPER BRIGHT CREE LED AND UNIMAGINABLE RUN-TIME - CREE LED bulb, UGOE special manufactured reflector, wide brightness range 2400mAh high-quality battery, lasting about 2.5 HOURS at100% brightness model at the normal (25C) temperature . EasyINSTALLATION AND MULTIFUNCTIONinstallationinsecondswithoutanytoolsMounttiedwithadjustablerubberstrapfitsa wide range of handlebar diametershandlebarandensuresbestpossiblelightingangle; SAFTY AND DURABLE  The light is using aircraft aluminum material so that keep light IP65 weatherproof shockproof .It is extremely durable and indestructible, even on the toughest terrains. LIFETIME GUARANTEE - we provide you one year warranty and lifetime limited repair against defects. If you are not satisfied with our product, please let us know and we will try our best to meet your demand. MULTI-FUNCTIONAL USE---FOUR MODEL. Can be use in different situation, compatible with jogging, skiing, off-road and any outdoor sports.