The Fenix HL22 Headlamp offers three useful brightness levels with 120-lumen max output and up to 55hr runtime from a single AA battery. A 90m carry distance and IPX-6 waterproof certification mean the durable, easy-switching HL22 performs in a wide range of conditions. Features Uses Cree XP-E R4 LED with a lifespan of 50,000 hours Uses one AA (Ni-MH, Alkaline) battery 62mm (Length) x39.5mm (Width) x40mm (Height) 44.6-gram weight (excluding battery) Digitally regulated output maintains constant brightness 60 degree tilt mechanism Fast, convenient all-in-one button switch Reverse polarity protection guards against improper battery installation Made from durable aluminum alloy and performance plastic Premium Type III hard-anodized anti-abrasive finish Toughened ultra-clear glass lens with anti-reflective coating