ATN is the manufacturer of the worlds largest selection of night vision devices and specialized optics. ATN uses the purest grades of heavy glass and computer aided optical designs. All lenses are multi-element, high aperture and multi coated. Night vision devices utilize only the best hand selected Image Intensifier Tubes. Material range from titanium, aircraft quality aluminum to hi-impact plastic. All unit feature O-rings, nitrogen purging and hard exterior coating. The ATN Viper designed primarily to be a single eyed goggle system for hands free application but it can also be used as a compact monocular. ATN Viper is one of the smallest and the lightest Night Vision single eyed Goggles in Gen 1, its weight is only 9 ozs. ATN Viper features single switch button operation, automatic brightness control, 1x magnification, FOV 20, and a range of focus from 3' to infinity. ATN Viper is so versatile that you can remove the unit from the goggles and use it as a monocular. Gen 1 consists of a vacuum tube and produces moderately clear images for relatively short ranges (75 - 100 yards). Excellent choice for affordable NVD's without the need for fine details. All ATN Night Vision units come with carrying cases, batteries, users manuals and instructional video. As with any night vision equipment; exposure to light may result in permanent damage. For all warranty claims, please contact ATN Warranty center directly at 1-800-910-2862 for repair or replacement. Non-Returnable item to Cheaper Than Dirt. Due to state and local laws Night Vision products cannot be shipped or sold to any residence in Rochester or Buffalo, New York.