... System, used for roadway surveillance;day/night surveillance, 300 to 500 meters, up to 700 meters. SECURITY SYSTERM-Laser Night Vision System (GLN-810420):Surveillance ... 980nm optional);Light Spot Shapinglight spot shaping for optical system, evenly distributed light intensity;Laser Beamsingle ... beam, image effect and system stability effectively enhanced;Coolingair cooling, ensuring ...