Lightning fast target acquisition and reliable toughness make the EOTech HWS 512 the most popular Holographic Sight (HWS) without night vision compatibility. Available in black for the tactical/recreational shooter and personal defense. Powered by two AA batteries. Featuring buttons located on the rear with easy access for both right and left-hand shooters and 20 brightness settings for dawn-to-dusk hunting as well as competitive shooting. For home defense applications compatible with night vision, check out our EOTech HWS 552 - the same sight with the added advantage of working in conjunction with night vision devices. NON NIGHT VISION COMPATIBLE L X W X H 5.6” x 2” x 2.5” (143 x 51 x 64 mm) WEIGHT 11.5 oz (325 g) WATER-RESISTANT 10 ft. (3 m) depth MOUNT 1” Weaver or MIL-STD-1913 rail BRIGHTNESS 20 daylight settings POWER SOURCE 2 x 1.5 V AA batteriesSupports lithium, alkaline, or rechargeable BATTERY LIFE Lithium: 2,500 continuous hours at nominal setting 12 at room temperature.Alkaline: 2,200 continuous hours at nominal setting 12 at room temperature. COUNTRY OF ORIGIN Made in USA