The Approach Z82 laser range finder with GPS give you the most accurate reading in the market within 10" if the flag, 

• GREEN VIEW - The map overlays show the hole layout, so you know the distance to the back, middle and front of the green
• LASER RANGE ARC - The Laser Range Arc feature draws and arc on the 2-D CourseView map at the distance the laser ranged, so you can see everything in play at a distance. 
• HAZARD VIEW - Quickly scroll through each hazard and layup distance on the map to see how far it is to reach each one
• ACCOUNT FOR WIND - The range finder now displays wind speed and direction, which makes figuring out which club to use and which direction to swing much easier
• PLAYSLIKE DISTANCE - This feature adjusts yardages for uphill or downhill shot based on the change in elevation from where you are standing to the target
• FIND THE PIN - On blind shots, the PinPointer feature will tell you the direction to the pin. So even if you can't see, you'll know where to aim. 
• LOCK IN ON THE FLAG - Image stabilization makes it easier to find and range the flag. And when you lock in on it, vibrational feedback will let you know. 
• GREEN CONTOUR DATA - Plan you best approach shot, and sink your putt with Green Contour Data. With your active Garmin Golf™ app membership, you can see the slope direction of the green on select courses directly on your device. 
• 41K+ PRELOADED COURSES - Your range finder comes preloaded with more than 41,000 full-color CoureView maps from around the world
• TOURNAMENT MODE - An external indicator light, which can be turned on and off, lets you and your playing partners kno when you're in tournament mode.