3" Long. 80 Lumens. Powered by a single AAA alkaline battery, it has a patented optical system-precision-machined aluminum reflector with thermal interface-that provides superior light projection and visibility Dual-mode functionality provides long hours of either High or Low power light output. The included metal S-Biner and lanyard make it a snap to attach the XS to a key chain, belt loop, zipper pull, or D-ring, but it's small enough to fit easily in a pocket, too, and light enough to carry with you wherever you go. Available in Black only. Comes with one AAA battery in beautiful gift box.