Untitled document D-221 can be used as hand held mini binoculars or head mounted goggles with the optional Face Mask/Helmet Mount (flip up mechanism). Device equipped with powerful built-in I.R.Illuminator. High Optical and Technical characteristics, Light Weight, Modern Design, Aluminum ruged housing, Fast lenses (f 1,2/26mm), Wide Field of View without any "fish eye effect", High Resolution, Light Overload(flash) Protection-automatic shut off. - this is just beginning of advantages of our the Most popular commercial model. Great choice for Law Enforcement, Professional Dark Room, Search and Rescue and Safe Boating at Night. Built in "bright light sensor" safely disables system against accidental switching it ON in daylight. Parameters: Image Intensifier | Generation 2+ US | Resolution | 28-38 lp/mm | Magnification | 1x (3x optional) | Lens System | 26mm f1.2 | FOV | 40˚ | @1000 yards | 860' | @1000 meters | 262 meters | Range of Focus | 10" to infinity 3m to infinity | Detection Range | 902' 275 meters | Recognition Range | 656' 200 meters | Diopter Adjustment | +4 to -4 | Weather Resistant | Yes | Camera/Camcorder Adaptable | No | IR Illuminator | Yes | Battery Type/Life | CR123/30 hours | Dimensions | 120mm x 100mm x 80mm | Weight | 500 grams | Operating Temperature | -4° F to 113° F -20°C to +45°C | Warranty | 2 years | |