Specification:- Intensifier Tube3rd Generation - Maximum Viewing RangeNot specified by manufacturer - Infrared IlluminatorYes (ideally effective up to 65'/20 m) - Magnification1x - Angle of View40.0° - Field-of-View (. 1000 Yds)2100' (697 m at 1000 m) - Minimum Focus Distance9.2" (0.2 m) - Lens Systemf/1.2 Objective lenses - Power SourceOne 1.5-volt "AA" battery or one 3-volt CR123A lithium battery - WeatherproofingWaterproof & fogproof - Dimensions4.2 x 2.0 x 2.5" (107 x 51 x 64mm) LxWxH - Weight1.38 lb (0.62 kg)