This is Tektite EXCURSION LS4 5-Watt Cree XRE LED Flashlight This Fantastic Light features: Free 3 D-cell Alkaline Batteries Included! Free Lanyard Included! Depth Rating: 2,000 feet (615 m) Lamp: Cree XRE LED Lamp Life: 10,000+ hours Burn Time: 10+ hours at full power Batteries: 3 D-cell Alkaline Power: 220 Lumens Materials: Anodized Aluminum and LEXAN Dimensions: 10.25 (26 cm) L x 1.875" (4.7 cm) Dia. Weight: 1.50 lbs. (0.68 kg) Individually serial numbered Military tested tough. The same model as supplied to the military. Nicknamed the "Ginsu knife" of flashlights, the Excursion LS4 provides blistering power in a package designed to be virtually indestructible. To earn this distinctive durability, each flashlight is computer machined from bar-stock Aluminum, for maximum strength and durability, and mated to the ultra-bright Cree XRE LED. Specialized optics produce a 6-degree spot beam that cuts through fog, smoke and murky water. Light output is equivalent to more than 150 regular LEDs. Burn time is 10+ hours at full power with an additional 10 hours of usable light. Double O-ring seals give this waterproof light an underwater depth rating of 2,000 feet. Includes, at no additional charge: glare guard and cushioned wrist lanyard. Meets FAA requirements for a commercial pilot&';s flashlight.