INFRAY H1108 is a sleek compact pen sized pen flashlight, power by two AAA Mi-MH rechargeable batteries. It features a tail cap switch, constant on opearion, a pocket chip for convenience, and amazing brightness up to 120 lumnes and over 5H run time for a light of its size. The aluminum housing with Type II military spec anodizing helps make the light extremely durable and abrasion resistant. Recharge from any USB port, eliminating the hassle of buying replacement batteries.