Rechargeable: Powered with integrated 1500 mAh Li-ion battery with micro-USB charge port 400 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 adjustment between max output and dimmed power Settings include full strength in proximity and distance modes, dimming, strobe, red night-vision and digital lock mode Integrated battery meter display shows % of power remaining Brightness Memory allows you to turn the light on and off at a chosen brightness without reverting back to default setting Multifaceted optical efficiency lens technology Red night vision has dimming and strobe modes and activates without cycling through the white mode Digital lock mode feature safeguards against accidental use when stored in a pack or pocket Black Diamond Spot 400-R Headlamp