Aluminum alloy, optical convex mirror, multilayer metal. It's pressure-resistant, hard, drop resistant. Lighting in heavy rain, not afraid of rainbad weather. Conical life-saving head, when in danger can help themselves, break the window to escape. Unique design, multi-directional heat dissipation, prolong the use time of wicks. The strong light flashlight can be matched with 18650 high performance lithium battery or ordinary 3AAA battery,the working voltage is 3.7V. Complies with CPSIA.