Luna Optics 6x24 1000 Laser Rangefinder Waterproof Monocular and Speed Meter 8x25 Mil-Spec TubeLuna Optics 1000m Laser Rangefinder Plus Speed Meter allows the user to see more clearly, further, and with more detail in low light and dark environments. It will also enhance ambient light in low light situations. Every night vision device works by amplifying the visible and near infrared light. Ambient light reflects from the viewed object, passes through the Objective lens, and creates an image of that object on the photocathode screen. Built in