Rechargeable 2400 mAh Li-ion battery with micro-USB charge port500 Lumen max outputRepreve fiber recycled elastic headband with next-to-skin comfortIP67 waterproof rating - operates at least 1.0 meters underwater for 30 minutesPowerTap Technology allows instant transitioning between full and dimmed powerBrightness memory starts at chosen brightness setting without reverting to defaultMultiple light modes: full strength in proximity and distance modes, dimming, strobe, red, green and blue night-vision, and lock modeMultifaceted optical efficiency lens technologyColour: Octane