The C4 enhanced LED pierces the darkness with 200 lumens and shines for 2.5 hours. Full featured tactical LED flashlight has a high, medium and low mode plus a strobe! Easily slides and locks in securely to rail mount. It has C4 LED technology, with a 50,000 hour lifetime, High temperature glass lens, gasket sealed, and 3 modes: High 11,000 candela peak beam intensity, 200 Lumens, 2.5 hours runtime, Low 550 candela peak beam intensity, 10 Lumens, 50 hours runtime strobe. It Optimized electronics for regulated intensity. The Textured parabolic reflector produces smooth beam with optimum peripheral illumination to aid in navigation. The Two 3 Volt "CR 123A" lithium batteries have with a shelf life of ten years. The Multi-function, push-button tactical tailswitch. One handed operation of momentary, variable intensity or strobe mode. The IPX4 rated design; water resistant operation, three meter impact resistance tested, pocket clip, adjustable lanyard, serialized for positive identification, water resistant, anti-roll head, LED Solid State power regulation provides maximum light output throughout battery life.