SPECIFICATIONS Image Intensifier Tube Advance Perfermance Auto-Gated Gen 2+ P45-White Phosphor IIT. Cosmetic level of IIT APW the best quality Resolution 60-64 lp/mm Visible Spots Clear FOV APW manually selected tubes, featured advanced clear-cut image. Image’s quality approximates to Gen 3 level. Magnification 1x Lens System 19 mm; F/1.26 FOV 51° Focus Range 0.25 m to infinity Diopter Adjustment -6 to +2 diopters LED Indicators (in the FOV) - Low Battery - IR On - Excessive Light Conditions Manual Gain Control Yes Bright Light Cut-Off Yes Infrared Illuminator Yes Battery Type One AA 1.5V Alkaline battery Battery Life (Operating) Up to 50 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 300 g (10.6 oz) Dimensions (w/o lens cap and eyecup) 102 × 63 × 69 mm (4.0 × 2.5 × 2.7 in)