Instead of taking a "one size fits all" approach, Leupold has redefined golf rangefinders with a simple principle: customize them to the individual golfer's needs. The GX-4i with Leupold's high performance DNA (Digitally eNhanced Accuracy) engine and advanced infrared laser provides faster measurements and increased accuracy displayed to the nearest 1⁄10 of a yard. Exclusive PinHunter laser technology, fog mode, and three selectable aiming reticles consistently hunt down the pin in virtually any weather conditions. Prism Lock technology affords unmatched accuracy by using highly reflective prisms already incorporated into many course features and pins to obtain a high intensity return to your GX rangefinder. With Prism Lock, holding the rangefinder steady becomes much less of a concern, and you can be assured your distance measurement is exact. Taking customization to the extreme, the removable Smart Key of the GX-4i adds the incredible benefits of True Golf Range (TGR) and the Club Selector, giving you the confidence you need to play the right shot every time. TGR provides ranging information matched to your personal hitting strength, the slope of the shot, and current conditions to accurately compensate for uphill shots that play long and downhill shots that play short. The Club Selector feature combines your specific hitting strength and TGR to the target, automatically recommending the appropriate club for each shot. Simply input the distance obtained with three specific clubs and the GX-4i will do the rest. Rugged, compact, and completely weatherproof, Leupold's GX rangefinders are sure to shave strokes from your game. Welcome to the future of golf.