Features: 2-in-1 switch. LED burn time: 110,000+ hours. Patent tactical grip knurled design. 5 watt extreme bright luxeon star LED. Aircraft grade crush resistant aluminum. Type III hard anodization for extreme corrosion resistance. International emergency pre-programmed S.O.S. signaling circuitry. Lens lighting distances: effective: 600 feet, visibility: 9 miles. 2, CR-123A lithium batteries: 15 to 20 hours burn time. O-ring sealed waterproof protection. Nylon belt holster.