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 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 Weight: 100g without cord Max lumens: 500 Max distance(s) on highest setting: 120m Max distance(s) on lowest setting: 12m Max burntime(s) on highest setting: FL1 7 H; reserve 20 H Max burntime(s) on lowest setting: FL1 350 H; reserve 0 H