Fenix TK20 Tactical Flashlight The Fenix Tactical series (T) features a powerful, solid, durable, and waterproof design intended for rugged outdoor and military use. Its as solid as a tank. The TK20 uses two CR123A batteries and maintains excellent constant brightness with two output modes: General mode, which can last for a whole night and can be used for general illumination, and Turbo mode, which can be used whenever high-powered light is needed search and rescue, long-range target identification, etc. The TK20 includes an optional belt clip that attaches to the side of the light with 2 allen-type screws (allen wrench included). The TK20 also includes a brass insert to replace the tactical grip ring. Features Cree Neutral White (Q2) 7090 XR-E LED with lifespan of 50,000 hours Two modes of output, selected by turning the bezel (Patented): -Turbo Mode: Constant 150 Lumens 2 hours (Ni-MH,2500mAh) -General Mode: Constant 45 Lumens 11 hours (Ni-MH,2500mAh) Highly efficient focused head (with polished reflector)- throws beam over 150 meters Digitally regulated output maintains constant brightness Uses two 1.5V AA(Alkaline,Ni-MH,Lithium) batteries,inexpensive and widely available 158.8mm(L)x34.1mm(D) Made of durable aircraft-grade aluminum Premium Type III hard-anodized anti-abrasive finish 152-gram weight (excluding batteries) Waterproof to IPX-8 Standard Toughened ultra-clear glass lens with anti-reflective coating Tactical tailcap switch with momentary-on function Rubber armored body tube,delivers excellent grip under adverse weather conditions Included accessories:holster, pocket clip,two spare o-rings,and a rubber switch boot