To create true night vision, the ND-3 Subzero Laser Designator uses the same patented green laser technology as the standard ND-3 series. However through innovative engineering and equipped with a unique circuitry enabling the DPSS 532nm green laser to now operate at temperatures as low as zero degrees fahrenheit without loss of power. The patented Rotary Optical Collimator uses a system of 9 fully multi-coated lenses that allowing full adjustment and control of the beam diameter and intensity to focus light where needed most. Rotating the collimator ring to minimum creates a bright micro beam of green laser light visible up to 3 miles. Rotating the collimator to more open settings provides plenty of illumination to light a trail at night or "paint a target" at up to 250 yards.
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