"The Armasight Sirius GEN 2+ SD MG 1x Multi-Purpose Night-Vision Monocular is a high-tech, tough and durable multi-use monocular that delivers great GEN 2+ performance, but at the lowest possible cost. Packed with features, the Sirius is a unit that is equally at home with the hunter as it is with the professional security officer or law enforcement professional. Mission configurable, the Armasight Sirius can be hand-held, head/helmet mounted; it can be mounted onto a rifle with a variety of different mounts, or it can be mounted in front of a camcorder or camera for night photography. Optional 3, 5 or 8x lenses can turn it into a long range night viewing device in seconds. The Sirius features manual brightness control, bright light shut-off circuitry and a spot/flood built-in IR illuminator. The Armasight Sirius is a night vision work-horse that will satisfy the requirements of the most demanding professional or casual night vision user with room to spare.|Compact, rugged design|Waterproof|Head mountable for hands-free usage|Manual Gain Control|Bright light cut-off|Ergonomic, simple, easy to operate controls|Adaptable for use with cameras|Built-in Infrared illuminator and flood lens|Life Tracker System available for measuring hours of operation (optional)|Export of this product outside of the United States of America is not allowed and is controlled by the US Department of State"