SPECIFICATIONS Image Intensifier Tube Advance Perfermance Auto-Gated Gen 2+ P43-Green Phosphor IIT Cosmetic level of IIT AP the best quality Resolution 57-74 lp/mm Visible Spots Clear FOV AP manually selected tubes, featured advanced clear-cut image. Image’s quality approximates to Gen 3 level. FOM 1800 Magnification 1x (3x and 5x optional) Lens System 26 mm; F/1.2 FOV 40° Focus Range 0.25 m to infinity Diopter Adjustment -6 to +2 dpt Led Indicators Low battery; IR On; Excessive light conditions Manual Gain Control Yes Bright Light Cut-Off Yes Automatic Shut-Off System Yes Infrared Illuminator Yes Battery Type One AA 1.5V Alkaline battery Battery Life (Operating) Up to 40 hours at 20°C Operating Temperature Range -51° C to +49° C (-60° F to 120° F) Storage Temperature Range -51° C to +85° C (-60° F to 185° F) Weight 0.35 kg (12.4 oz)