ThruNite Key&nbsp;Chain&nbsp;T&nbsp;Series LED&nbsp;Flashlight, Mini Cree XP-G2 LED with a lifespan of 20+years of run time Powered by 1 AAA battery Solid construction ( waterproof to IPX-8, Type III hard anodized, Aircraft quality aluminum body Orange peel (OP) reflector for smooth light output. Adopts twist switch design for easy one-handed operation