SPECIFICATIONS Image Intensifier Tube Advance Perfermance Auto-Gated Gen 2+ P45-White Phosphor IIT Cosmetic level of IIT APW very limited Resolution 60-64 lp/mm Visible Spots very limited APW features minimum cosmetics imperfections that allowed close to the edges and will not detract viewing. FOM 1800 Magnification 1x (3x and 5x optional) Lens System 27mm; 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) Dimensions 112 × 61 × 61 mm (4.4 × 2.4 × 2.4 in)