The folks at Leupold continue to make “evolutionary” changes to their range-finders, in hopes of improving speed, accuracy and ease of use. And those enhancements are a big part of the story behind the new GX-4i2, the latest offering in this realm from the Beaverton, Ore., concern. So is a recent ruling by the USGA that for the first time makes this product legal for tournament play under Rule 14-3, provided its bright, yellow-coated Smart Key is not employed. Essentially, the GX-4i2 is two range-finders in one. At its core, it is a simple yet highly technical line-of-sight measuring device that utilizes a DNA (for Digitally eNhanced Accuracy) engine and advanced infrared laser system to provide faster measurements and accuracy displayed to the nearest 1/10 of a yard, up to 400 yards away. In addition, it enables golfers to track down distances in any and all weather conditions. A Prism Lock system is designed not only to bolster accuracy but also make it less of an imperative to hold the device steady. What makes GX-4i2 truly unique, however, is its removable Smart Key, which adds several benefits. One called True Golf Range calculates slope, altitude and temperature. There is also a feature dubbed Club Selector, which combines a player’s specific hitting strength and TGR to automatically recommend the appropriate club for each shot, based on data a golfer has already inputted about his usual distances.