The EOTech HWS XPS2 is the shortest, smallest, and lightest EOTech holographic sight available. Its size and weight offer convenience for shooters and law enforcement officers. It runs on a single CR123 battery. This compact, single-lithium-battery configuration leaves more rail space for rear iron sights or magnifiers. If you’re looking for all these features with the advantage of night vision, check out the XPS3. NIGHT-VISION COMPATIBILITY None, see the XPS3 Line for NV Compatibility L X W X H 3.8” x 2.1” x 2.5” (97 x 54 x 64 mm) WEIGHT 9.0 oz (255 g) WATER-RESISTANT 10 ft. (3 m) depth MOUNT 1” Weaver or MIL-STD-1913 rail BRIGHTNESS 20 daylight settings POWER SOURCE 1 x CR123 battery BATTERY LIFE 1,000 continuous hours at nominal setting 12 at room temperature COUNTRY OF ORIGIN Made in USA