ND-NG1 night vision goggles feature state of the art electronics, delivering superior image quality. Durable body construction and extremely comfortable design allow for long duration of wear in any environment. Adjustable focus, for more precise observation. Automatic light protection circuit disengages the power in the event of accidental exposure to intense light. Mounts comfortably on the head for hands-free operation. Powerful built-in infra red illuminator for operations in complete darkness. Wide field of view Technical Specifications Generation: 1 Magnification: 1x Range of View(feet): 400 Power Supply: 2 AA Weight (lbs): 1.8 Dimensions (in): 6.8x6.6x4.8 Focal Length (in): 1.02 Aperture: 1;1.2 Focusing Range (in): 8 - infinity Resolution: 24-35 lines / mm