The yukon nvmt spartan 3x4 wp night vision monocular in blue is equipped with a 42mm objective lens and 3x magnification designed for night time and outdoor observation the spartan 3x42 wp monocular features a waterproof construction and powerful built in ir illuminator which increases the viewing distance and enables observation in lowlight conditions and even complete darkness the ergonomic button layout combined with its soft durable rubber coating ensures ease of use and a reliable grip