Upon setting up the ballistic profile in your scope and ranging the target via the smart rangefinder, the system will automatically adjust to correct the point of impact. For nighttime shooting, the effective range depends on the IR illuminator being used. With the included illuminator, the effective range is around 200 yards. Upgrading to the IR850 Pro (Level 2 IR) extends the range to about 400 yards, while the IR850 Supernova (Level 3 IR) offers even greater illumination performance, allowing you to reach the full 400-yard range with improved clarity.