The Microstream is a compact single AAA alkaline battery powered flashlight designed for use inall markets. It features a tail cap switch, momentary or constant on operation, a combinationpocket/hat clip for convenience, and amazing brightness and run time for a light of its size andprice. The aluminum housing with Type II Military Spec anodizing helps make the light extremelydurable and abrasion resistant Compact single AAA alkaline battery powered flashlight Features a tail cap switch with momentary or constant on operation Hat clip for convenience Aluminum housing with Type II Military Spec anodizing 45 lumens Unbreakable polycarbonate lens 2.25 hours of run time