The Nite Rider Lumina 1000 Boost is the perfect light for mountain bikers, road riders, adventure riders and urban commuters. Featuring a tried and true handlebar mount, fits up to 35mm, that is sure to remain rock solid whether on the trail or pavement. Double clicking the power button activates Boost Mode, giving you the option to operate your light at 1000 lumens maximum light output! This self-contained light makes use of the Intelli Charge function, which charges the battery twice as fast as the normal charge rate when connected to a higher amp AC adapter. With the new Nite Rider custom engineered collimator lens, the Lumina 1000 Boost projects a wide and even beam pattern of 1000 lumens! All New Collimator Lens, produces a generous even widespread beam Boost Mode, double click power button to unleash maximum LED output 5 Light Levels plus 2 Daylight Flash Modes CREE LED at 6000k FL1 Standard IP64, dust and water-resistant Secure on and off-road capable handlebar mount Fits standard and oversize 35mm handlebars Perfect for helmet mounting (Helmet Mount sold separately) Intelli Charge Reduce charge time in half! Convenient USB rechargeable Low battery indicator Lock Mode, perfect for use during storage and transporting the light. Press and hold power button for 7 seconds to lock out operation of light.