The MicroStream™ by Streamlight® is a 20 Lumen, 1-AAA battery flashlight that fits in the palm of your hand. It features a Proprietary Micro Optical System (MOS) with "Battery-Booster" electronics to provide a super-bright 1/2 watt beam from a 30,000 hour high flux LED, for optimized output and runtime. Constructed of Type II MIL-SPEC abrasion and corrosion-resistant anodized aircraft aluminum. An internal polymer body liner and shock proof switch housing allow for operation under the most extreme conditions. It is O-ring sealed and has a rubber push button tail cap switch, which can be deactivated by rotating the tail cap. Abrasion, corrosion and water resistant. Includes a pocket clip and a break-away neck lanyard. Measures 3.5" long by 9/16" diameter and weighs 1.04 oz. Includes 1 "AAA" battery. Color: Matte Black.