Rechargeable 400 lumen Auto-Off LED Headlamp has 3 modes, All-on/Boost at 400 lumens for 4 hr, Spotlight at 200 lumens for 12 hr, and 22 hr runtime Floodlight at 100 lumens|Smartly designed headlamp bracket also attaches directly to Klein Hard Hats (those equipped with bracket system)|Adjustable woven fabric strap with silicone grip secures to headlamp onto head, hard hat, or cap|Headlamp automatically turns off after 3 min in bright light via auto-sensing technology, extending battery life (feature can be disabled by holding the power button for 10 sec)|Battery gauge indicates level of battery life with colored LED lights|Slim profile with pivoting mount to allow up to a 64 deg lighting angle|Light can be easily removed from bracket for recharging|Rechargeable via micro USB port (cable included)|Durable headlamp - drop test rating of 6 ft, dust and water-resistant|Auto-off light sensor, battery gauge and fabric strap