The Phantom 150 nightvision monocular is designed to address military, law enforcement and other professional requirements to see under the darkest of conditions. Waterproof and compact, it is amongst the most affordable generation 2+ systems upon the market. There are many different variables that effect the distance that one can see with a nightvision device, among them the object's size, the level of details being sought from the object and the conditions of observation. Nightvision devices detect much further under a full moon and clear skies than they will under a new moon and cloudy skies.