NS15 is a tactical dual-tube night vision binocular developed and manufactured by N-Vision Optics specifically for situation where mission performance and depth perception are critical factors. The unit utilizes two highest quality image intensifier tubes to provide crisp, clear images under the darkest conditions. Rugged, waterproof, and lightweight, NS15 offers better depth perception and image clarity than single tube systems. This greatly improves the user's ability to perform mission critical tasks. NS15 can be hand-held, head, or helmet mounted. It is built from two Night Strike night vision monoculars that can be easily separated from each other. This provides a great flexibility for a user. Monoculars themselves can be independently hand-held, mounted on a weapon, or attached to a video camera. The unit is fully submersible to a depth of 6.5 feet (2 meters) and is equipped with infrared illuminator that is invisible to the human eye.