1,Laser Night Vision Systerm, 2,day/night surveillance, 3mainly used for long distance ... , up to 2000 meters Glopro Laser Night Vision System GLN-810408--Laser Night Vision Systerm Specification:Surveillance range during nighttime is 100 ... , built-in heater and fan. IR antireflection coating added to all protection glass, glass thickness of 1.5cm, cooling with cooling ...