LED Lenser X21.2 Flashlight is one of most popular products at JustBestBuys. LED LENSER's upgraded X21.2 has an impressive run time of up to 100 hours, nearly 400% longer than the original X21, and offers incredible lighting power at 1500 lumens for over 600 meters. Added technology features include Smart Light Technology, which allows the user to program light functions specifically for the task at hand, and LED LENSER's Advanced Focus System and X-Lens Technology, both of which improve light customizability and quality. A low battery message system which lets the user know when the light is nearing the end of run time, making the X21.2 one of those true feats of engineering and design that you have to hold to appreciate its impressive power and authority. Functions: On/Off, Advanced SLT (8 functions for brightness control, strobe & more)Additional Features: High End Power LED, Advanced Focus System, X-LENS TechnologyLumens: 1500 / 250 (max/min)Beam Distance: 600m / 250mBattery Life: 10hr / 50hrWater Resistance: IPX4 (splash resistant)Battery: 4 x D-cellLength: 15.63 in / 39.7 cmWeight: 49.38 oz / 1400 g. Follow 'Visit Store' link to find out recent information and price updates for the LED Lenser X21.2 Flashlight.