NOO1009 Features: * Adjustable focus with central focusing mechanism * Two high-quality generation-1 image intensifier tubes * Built-in columnated infrared illuminator for use in complete darkness or to improve target recognition in any environment * Impact-resistant molded thermoplastic lens housings * Padded neck strap * Magnification: 3x * Lens diameter: 42mm * Objective Optic Design: manual focus * Resolution: 35 lp/mm on center * Interocular distance: adjustable from 57 mm to 73 mm * Minimum Focal Distance: 6.6" (2m) * Field of View at 200 ft. distance: 67 ft. wide (61m / 20m) * Power Supply: requires (1) 3-volt Type-123 lithium battery (not included) * Battery Life: 40 to 80 hours, depending on infrared usage Construction: * Objective and ocular lenses constructed of high-quality all-glass optics Dimensions: * Dimensions: 6.65 L x 5.85 W x 2.70 H