It is designed to provide additional infrared (IR) illumination during observation with night vision devices in very low light conditions (no moon, heavy cloud etc.), including complete darkness.
Yukon NVRS 2.5x50 Doubler increases magnification of the 50mm NVRS scopes. Attach the Doubler to a NVRS unit to increase magnification for the best viewing.
NVRS IR Flashlight helps illuminate your target by combining Yukon IR unit and any unit in the NVRS line to double or even triple your viewing distance at Gen 1 capabilities; the honeycomb filter diffuses light to prevent detection while providing illumination.