FNIRSI NVS-20 is a night vision device to observe objects in darkness or weak light. The observation distance in the low-light condition is infinite, and it can reach 300 meters in a completely dar...
FNIRSI NVS-40 is a night vision instrument used for observing objects in pitch black or weak light. The observation distance in weak light is not limited and can reach 300 meters in pitch-black env...
