The JetBeam BC40 is a high output flashlight which uses the top-of-the-line Cree XML LED. This bright and powerful flashlight outputs as much as 830 lumens and has a beam distance of 344 meters. The intuitive user interface is extremely user-friendly; simply rotate the bezel to change from a high output to low output mode, and the forward clicky switch on the tail provides easy access to a momentary-on feature. The type III hard anodized finish and aero grade aluminum alloy body make the exterior extremely durable, and the customized diamond-shaped anti-rolling design ensures a better handgrip. This bright, rugged, and versatile flashlight is excellent for hunting, security, search and rescue, outdoor activities, and more. Features and Specifications LED: CREE XM-L Maximum output: 830 lumens Maximum runtime: 11 hours Battery: 4 x CR123 or 2 x 18650 (Batteries not included) Reflector: Precision aluminum reflector Aero grade aluminum alloy construction High performance reflector-based optic system Fully regulated advanced power management Reverse polarity protection circuit 2 modes of output AR coated scratch-resistant mineral glass lens Type III hard-anodized finish for corrosion and scratch resistance IPX-8 Waterproof (submersible up to 2 meters) Impact resistant to 1.5 meters Dimensions: Head Diameter 48mm (1.9in), Tube Diameter 25.4mm (1in), Total Length 223mm (8.8in) Weight: 227g (8oz) (without battery) Output and Runtime: High Mode: 830 lumens / 1h 30min Low Mode: 130 lumens / 11h