The Leupold GX-4i² offers every stroke-saving advantage we can pack into a compact rugged laser rangefinder... revolutionary Smart Key technology now conforms to USGA Rule 14-3 (pg. 6-7). Lightning-fast DNA® engine; improved PinHunter® 2 Laser Technology; and a bright vivid OLED display come together with proprietary features such as True Golf Range (TGR®) and Club Selector. The result is a training/playing aid that can be tailored to your own personal ball-striking abilities or used for tournament play when permitted by Local Rule. Club Selector Another Leupold exclusive. Club Selector gives you every advantage to hit the shot you need. By pre-entering your normal striking distances for the 8 6 and 4 irons Club Selector will then make club recommendations based on the True Golf Range (TGR) of your shot. It's like having your own personal caddie who knows your every shot. Conforms to USGA Rule 14-3 The chrome faceplate (included) disables True Golf Range and Club Selector features to make the GX-4i² permitted for use under the rules of golf (per USGA Rule 14-3/0.5). Durability Our products are battered and abused by thousands of enthusiasts every day and they are legendary for their durability. We know how to make a product rugged and we've poured that knowledge into the weatherproof Leupold golf rangefinder. So the next time you play through an ill-timed squall you can be confident at least one friend will stick by you side - your Leupold golf rangefinder. Fog Mode Rain or shine many golfers hit the links regardless of conditions; that's why we designed Fog Mode. Most rangefinders give measurements from the first target returned which in some cases is the fog between you and the pin. Your GX will cut through the weather and provide fast accurate measurements to get you on the green. You don't let anything stand between you and the cup so why should your rangefinder? Pinhunter 2 & Prism Lock The key to fast accurate ranging is the ability to lock on to the flagstick. For some a shaky hand has made it more difficult to get on-and stay on-the pin. Not anymore. The improved PinHunter 2 Laser Technology (available on GX-3i² and GX-4i² filters out background images and makes zeroing-in on the target faster and easier. Three different reticle options give you more flexibility in choosing the one that's best for you. Leupold GX Prism Lock Technology combined with PinHunter 2 Laser Technology make "locking on" faster than ever before. You get an audible tone when the rangefinder finds the prism and the distance is immediately displayed speeding up the pace of play and giving you more confidence to hit the shot. Quick Set Menu The Quick Set Menu is intuitive and easy to use giving you fast access to the incredible performance of your GX golf rangefinder. All features and modes are easy to see without cluttering the field of view. Scan Mode When you want multiple readings in one quick sweep just hold down the Power button and the display will continuously update with accurate line-of-site measurements. As an extra benefit on courses utilizing prism technology your GX will beep and the display will freeze the moment you scan past a prism-topped flag stick assuring you of an accurate reading. True Golf Range (TGR) Many rangefinders and GPS systems can provide straight Line-of-Sight (LOS) ranging. But as serious players know the true distance to the hole is rarely a simple straight line. Inclines declines altitude temperature and other atmospheric conditions dramatically affect your actual distance and club selection. Leupold rangefinders with True Golf Range are the only rangefinders in the world that arm you with this critical information. And when you combine TGR with our exclusive Club Selector you get a specific recommendation for which club to hit based on your own personal ball-striking abilities.