Sleek compact pen sized, USB rechargeable lithium ion battery powered flashlight features a tail cap switch, momentary or constant on operation, a pocket clip for convenience, and amazing brightness and run time for a light of its size. Machined aluminum alloy case. Type II MIL-Spec anodized finish. Glass lens, gasket sealed. C4 LED technology, impervious to shock with a 30,000 hour lifetime Light output: 65 lumens. 6.15 inch length. 0.74 inch body diameter.