Bicycle LED Rear (Tail) Light & Helmet Light SUPER BRIGHT & WATERPROOFT & 240 WIDE RANGE 3 LIGHT MODES: SOLID, FAST STROBE, SLOW STROBE FOR TAIL & HELMET LIGHTS 50 HOURS ON STEADY & 150 HOURS ON FLASH FOR TAIL & HELMET LIGHTS MOUNT ON HANDLEBAR, SEAT RISER, FORK, BACKPACK, HELMET ETC