Approach Z80 laser range finder with GPS is the most Accurate laser range finder available. It also gives you a new perspective on more than 41, 000 courses worldwide. You actually see a full-color course view and Green view overlay in 2-d for the hole you're playing, showing distances to the front and back of the Green. Then when you activate the laser range finder, you get an amazingly Accurate distance to the pin -within 10”. Plus, you also see Accurate distances to hazards at the same time. This speeds up play, because there's No need to range them separately. Approach Z80 automatically determines which hole you are currently playing to provide course layout and appearance information.