The HP11 High Intensity Headlamp by Fenix has outstanding performance and a solid construciton. This is the black color model. It is built for rugged and extreme environments. With it's Cree XP-G R5 LED it can throw a 277 lumen beam and on the lowest of the seven output settings it can run for over 206 hours on the 4 AA batteries that powre it. It works submerged in 2 meters of water for up to 30 minutes with the IPX-6 rating so it performs well for caving and other activities where water might be encountered. Features and Specifications: Cree XP-G (R5) LED with a lifespan of 50,000 hours Uses four 1.5V AA (Ni-MH, Alkaline) batteries Light:59.5mm (Length)x50mm (Width)x55.5mm(Height) Battery Case:88.3mm (Length)x73.5mm (Width)x26.4mm(Height) 180-gram weight (excluding batteries) Digitally regulated output - maintains constant brightness Reverse polarity protection, to protect from improper battery installation Dual switch system in the top, easy operation The light is made of durable aircraft-grade aluminum, the rest is made of quality plastic The metal part has a premium Type III hard-anodized anti-abrasive finish Toughened ultra-clear glass lens with anti-reflective coating