This is a classic work horse, developed for that environment where you need a headlamp to handle the harshest conditions. Rugged aluminum housing and waterproof construction, the IP68 rated HL23 headlamp is ready for anything you can throw at it. Armed with a powerful Cree XP-G2 LED, this AA battery powered headlamp provides 150-lumen output with a 180-foot/55-meter beam distance. Featuring three brightness levels and burst mode, the HL23 is a great choice for your nighttime adventures. FeaturesUses Cree XP-G2 R5 LED with a lifespan of 50,000 hoursThree modes of output:High: 150 Lumens (Ni-MH Battery: 1 hour 20 min.; Alkaline Battery: 1 hour)Mid: 50 Lumens (Ni-MH Battery: 5 hour 40 min.; Alkaline Battery: 4 hour 25 min.)Low: 3 Lumens (Ni-MH Battery: 100 hours; Alkaline Battery: 110 hours)Rugged aluminum housing to shed heat and impactDigitally-regulated output maintains constant brightness60-degree tilt mechanismFast, convenient all-in-one button switchReverse polarity protection guards against improper battery installationMade from durable aluminum alloy and performance plasticPremium Type III hard-anodized anti-abrasive finishToughened ultra-clear glass lens with anti-reflective coatingIP68 Rated. Waterproof up to 2 meters/6.5 feet for 30 minutes. Impact resistance up to 1.5 meters/4.92 feet. Absolutely dustproof.