Machined aircraft grade aluminum with anodized finish Powered by 4 alkaline button cells Easily attaches/detaches to just about anything with convenient pocket clip or key ring The Streamlight Nanolight features a 5mm White LED that is impervious to shock. It has a 100,000 hour lifetime so it will never need replacing. This light has a run time of up to 8 hours of declining usable output and machined aircraft aluminum construction with a rotating on/off head switch. Includes a non-rotating snap hook and 4 IEC-LR41 coin cells. This super-bright miniature, take anywhere with you flashlight attaches to just about anything from a key chain to a coat zipper or D-ring.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }