OVERVIEWYour NVRS starlight night vision scope is a professional-quality device designed to provide highquality viewing in nearly total darkness. Many active night vision devices require an artificial infraredlight source. The NVRS is a passive starlight device: it does NOT require any artificial light source.The NVRS does include a powerful infrared illuminator that is useful when the subject to be viewedis in shadows or total darkness. The NVRS consists of a sophisticated electro-optical assemblycontained in an extremely durable titanium housing. The entire unit is ruggedized for extreme fieldconditions. It is entirely self-contained and can operate for up to 50 hours at temperatures rangingfrom -22 °F to +104 °F (-30 °C ~ +40 °C ).Your NVRS scope is ideal for a wide variety of professional and recreational uses including:• Wildlife observation• Security• Search and rescue• Nighttime photo/video