Streamlight MicroStream STL-66318Streamlight's new ultra-small, super bright personal light with Proprietary Micro Optical Systems has "Battery-Booster' electronics to provide a super-bright beam. • Up to 20 lumens output for up to 1.5 hrs runtime • Super-bright 1/2 watt, 30,000 hour high flux LED • An internal polymer body liner and shock proof switch housing allow for operation under the most extreme conditions • Rubber push button tail cap switch • O-ring sealed; unbreakable polycarbonate lens • Corrosion and water proof construction • Type II MIL-SPEC abrasion and corrosion-resistant anodized aircraft aluminum • Shock-proof; drop test verified above the industry standard of six feet • Unbreakable pocket clip • Includes (1) "AAA' alkaline battery