Fenix TK21 468 Lumens LED Flashlight Powerful digitally regulated, LED flashlight with four brightness levels and two flashing modes 468-lumen output on turbo down to five-lumen output on low; 214-meter beam; runtimes from 110 minutes to 220 hours on two 3V lithium batteries Constructed of aircraft-grade aluminum with type III hard-anodized anti-abrasive finish; knurling on body for extra grip Waterproof to a IPX-8 standard; frost-resistant batteries work in frigid conditions Equipped with gun mount support, tactical grip ring, and dual-recoil absorbing springs; limited lifetime repair warranty