1.led qualitity:10 led 2.material :ABS 3.battery :3*AA *fine outline bivouac light led Specifications*led qualitity:10 led *material :ABS *battery :3*AA *fine outline*length:160mm. top diameter :75mm, bottom diameter:87mm.*Size:160*90*90*weight:145/160g* Use 3*AA batterise ,outline is fine and elegant ,energy saving,longlife ,up to 100000hours, multi-function,such as ,camping,reading ,roating, ...