The 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 ft, 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.