ATN Auto-Gated Green Phosphor 1x Night Vision Goggles Gen 3 58-60 lp/mm Black. In a sea of dual tube night vision goggles the PS-31 is one of the smallest and lightest units by far. The PS31s can be outfitted with various levels of high-performance made in specialized factories Gen 3 image intensifier tubes. Working directly with U.S. Operators input the PS-31 was designed to increase system resolution significantly reduce head borne weight improve system of center of gravity provide additional operational utility and improve overall operator situational awareness and adding a 50 deg FOV for maximum visibility in the field. These tubes are auto gain-capable allowing the system to adjust the brightness of their image as situations on the ground dictate. The PS-31 BNVD has independently pivoting tube housings that allow the operator to run the goggle in a binocular or monocular configuration. Using two tubes at once allows the eyes to create depth perception and increases the ease in maneuvering terrain and obstacles as well as operating devices such as control panels and door knobs. However monocular configurations allow for ease in transitioning between various lighting conditions that often occur on the battlefield and cause operators to switch between night vision and weapon-mounted optics. Another benefit to the pivoting tube housings is the ability to mount the flatten goggle against the front helmet surface when stowed. The ability to pivot the tube housings against the helmet surface creates an overall lower profile increasing operator safety and equipment life. Specifications for ATN Auto-Gated Green Phosphor 1x Night Vision Goggles: Manufacturer: ATN Night Vision Generation: 3 Image Intensifier Tube: GEN 3 Alpha Image Intensifier Color: Green Phosphor Length: 4.4 in Weight: 1.28 lb Magnification: 1 x Objective Lens Diameter: 27 mm Color: Black Focus Range: 0.25 yds to infinity Field of View Angle: 51 degrees Battery Type: CR123 Water Resistance Level: IP65 System/Lens Resolution: 58 - 60 lp/mm Features of ATN PS31-3 Gen 3 51 FOV Dual Tube Night Vision Goggle/Binocular Comfortable flip-up headgear Lightweight and Compact Waterproof Battery pack (optional) Package Contents: ATN Auto-Gated Green Phosphor 1x Night Vision Goggles ATN NVGOPS31530: Auto-Gated Green Phosphor 1x Night Vision Goggles Gen 3 58-60 lp/mm Black