Uses Cree XM-L2 U2 LED with a lifespan of 50,000 hours 5 Modes of Operation Turbo: 1000 Lumens, 1 hr. 10 min. High: 400 Lumens, 3 hr. 25 min. Mid: 150 Lumens, 10 hr. Low: 10 Lumens, 150 hr. Strobe: 1000 Lumens Maximum Beam Distance: 787 feet (240 meters) Intelligent Memory Circuit. Automatically enters the previously used brightness level when turned on Low-voltage Warning Function Digitally regulated output maintains constant brightness Reverse polarity protection, to protect from improper battery installation Anti-roll, slip-resistant body design Tactical tail switch for momentary-on function Tail mode switch for easy and fast output selection Instant Strobe mode Reliable Dual-layer Body Dual Spring Design for better impact resistance and more suitable for flat-head batteries Specialized Remote Pressure Switch Integration Made of durable aircraft-grade aluminium Premium type III hard-anodized anti-abrasive finish Toughened ultra-clear glass lens with anti-reflective coating Waterproof to IPX-8 standard (Underwater 2 Meters for 30 Min.) What's in the box 1 - Fenix TK16 LED Flashlight with pocket clip 1 - Holster 1 - Lanyard 1 - Spare O-Ring 1 - Instruction Sheet and Warranty Card