For a technical consumer who expects all-around performance and features out of their headlamp but still values a small size and compact package. This user has access to a power source and values the ability to go out on their mission with a fully charged battery.     FEATURES: 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 fibre 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 the 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 Weight: 73g without cord Max lumens 400 Max distance on highest setting: 100m  Max distance on low setting: 12m Max burntime on highst setting: FL1 4 H; reserve 1 H Max burntime on lowest setting: FL1 225 H; reserve 0 H