The PS-31 Binocular Night Vision Device (BNVD) is a compact lightweight dual tube goggle to replace the legacy PS-15. 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 US made 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. - Comfortable flip-up headgear - Lightweight and Compact Waterproof - Battery pack (optional) - Made in USA - Limited Three-Year Warranty - Generation Gen 3 Auto-Gated White Phosphor - Resolution 58-60 lp/mm - Magnification 1 X - Lens System f/1.18 - Proshield Lens Coating Yes - FOV 51 ° - Range of Focus 0.25 yard/m to infinity - Diopter Adjustment -5 to +5 - Automatic Brightness Control Yes - Bright Light Cut-off Yes - Infrared Illuminator Yes (Built-in with flood lens) - IR Indicator Yes (in FOV) - Low Battery Indicator Yes (in FOV) - Power Supply 1 x 3V (CR123) - Battery Life 60 h standard/ 300 h with Battery Pack (optional) - Environmental Rating IP65 - Finish Matte Black Corrosion Resistant Fibre re-enforces polycarbonate body - Operating Temperature -59°F to 120°F / -51°C to 49°C - Storage Temperature -59°F to 185°F / -51°C to 85°C - Dimensions 4.4 x 4.15 x 3.4/112 mm x 105 mm x 86 mm - Weight 1.28 lbs / 0.58 kg - Country of Origin USA - Available for Export No - Warranty 3 years