Product Description The Stylus Pro is a sleek compact pen-sized, two AAA alkaline battery-powered flashlight designed for use in all markets. It features a tail cap switch, momentary or constant-on operation, a pocket clip for convenience, and amazing brightness and runs time for a light of its size and price. The aluminum housing with Type II Military Spec anodizing helps make the light extremely durable and abrasion resistant. From the Manufacturer Streamlight's Stylus Pro black LED pen flashlight with holster features a super bright, high flux, 1/2 watt LED, and has a lifetime of up to 30,000 hours. It consists of a micro optical system which facilitates optimized output and run time. This flashlight is corrosion proof and has waterproof construction with an unbreakable polycarbonate lens as well as a pocket clip. Durable, anodized machined aircraft aluminum construction White LED produces 100 Lumens; 950 Candela; 62m beam; runs 8 hours IPX4 water-resistant; 2m impact resistance tested About the size of a marker, it fits conveniently in your pocket 5.3 inches (134 millimeter); 1.64 ounce (46.9 gram) Removable pocket clip