Designed for the hardened commuter, navigating the hustle and bustle of city traffic every day, the Exposure Sirius Mk6 DayBright Headlight shines a stunning 575 lumens of light on dark streets ahead for a safer ride home. The CNC-machined aluminum housing provides robust durability and water-resistance for reliable performance in varying conditions. The Sirius comes equipped with seven modes that you can easily switch between with the Optimized Mode Selector for just the right level of brightness, while the side illumination ports boost your peripheral visibility when you speed through intersections. Showing you when you need to recharge, the Fuel Gauge display indicates just how much battery life you have left, and the Lithium-Ion 2,900mAh battery comes with a USB cable to make charging on the go a breeze.