The Nite Ize Inova XS features exceptional engineering in an unexpectedly compact, lightweight size. 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 and boasts an impressive 110 Lumens. With an effective range of 137 feet, its beam is exceptionally powerful for such a compact flashlight. Its push button end-cap switch activates constant and momentary high and low modes. The stainless steel clip makes it a cinch to attach securely to a pocket or waistband and it's light enough to carry with you wherever you go.