Rechargeable: Powered with integrated high capacity 2400 mAh Li-ion battery with micro-USB charge port 500 Lumen max output Recycled elastic headband featuring comfortable next to skin Repreve fiber construction IP67: Waterproof-Tested to operate at least 1.0 meters underwater for 30 minutes. PowerTap™ Technology allows instant transitioning between full and dimmed power Brightness Memory allows you to turn the light on and off at a chosen brightness without reverting back to default setting Settings include full strength in proximity and distance modes, dimming, strobe, red, green and blue night-vision, and lock mode Multifaceted optical efficiency lens technology Black Diamond Storm 500-R Rechargeable Headlamp