The MicroStream is a compact single AAA alkaline battery powered LED pen light flashlight designed for use in all markets. It features a push button tail cap switch, momentary or constant on operation, a combination pocket/hat clip for convenience, and amazing brightness and run 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. Utilizing the latest C4 LED technology, this ultra compact and lightweight flashlight is optimized for output and run time..