Nikon COOLSHOT 40i Golf Laser Rangefinder 100% Other Fibers Imported ID Technology displays slope-adjusted distance, as well as to-the-target distance, enabling you to select the proper club for uphill or downhill shots. HYPER READ provides quick and stable measurement response, in approx. 0.5 second, regardless of distance to the target. Incredible ranging capability (8-650 yards), reported in  yard increments, with an accuracy or +/- 2  feet. Class 1 laser product, power output not exceeding .0975 milliwats See what lies ahead, behind, above or below with amazing sharpness and clarity with the integral 6-power monocular featuring legendary Nikon optics. Push and release the POWER button for 8-second continuous measurement scanning, allowing quick measurements to multiple targets.