The NITECORE BR35 bike light uses an innovative dual distance beam, similar to car headlights, to simultaneously light distances both near and far to eliminate dark zones and ensure safety. Equipped with two powerful CREE XM-L2 U2 LEDs the BR35 produces an 1800 lumen max output with 182 yard throw to provide users with ample light for any environment. A simple three button user interface allows users to easily toggle light modes (short range beam, long range beam, dual range beam) using the mode (M) switch and adjust brightness levels using the plus (+) and minus (-) switches while on the go. An easy to read OLED screen located on the top of the bike light displays the current light mode, brightness level, and the remaining runtime allowing riders to quickly check levels while in motion. A built-in 6800mAh Li-ion rechargeable battery provides users with up to seventeen hours of runtime, perfect for extended night time riding. When it's time to recharge the battery, users can easily recharge anywhere by connecting the supplied charging cable to any available USB power source, making this a great bike light for daily use or traveling. Specifications LED: 2x CREE XM-L2 U2 LEDs Battery Type Supported: 6800mAh Li-ion Battery (Built-in) Peak Beam Distance: 192yds (176m) Peak Beam Intensity: 7750cd Brightness Outputs: --- Short Range Beam: +++++ Turbo: 800 lumen / 2h +++++ High: 465 lumen / 5h 45min +++++ Mid: 285 lumen / 8h 30min +++++ Low: 150 lumen / 17h --- Long Range Beam: +++++ Turbo: 1000 lumen / 2h +++++ High: 550 lumen / 5h 45min +++++ Mid: 330 lumen / 8h 30min +++++ Low: 180 lumen / 17h --- Dual Range Beam: +++++ Turbo: 1800 lumen / 1h +++++ High: 1015 lumen / 2h 30min +++++ Mid: 615 lumen / 4h +++++ Low: 300 lumen / 8h IP Rating: IPX7 Impact Resistance: 1.5m Dimensions: 4.3"x1.93"x1.61" (109.3mmx48.9mmx40.9mm) Weight: 8.27oz (234.5g)