A laser rangefinder is one of the highest value-per-dollar purchases in golf: it removes yardage guesswork entirely and speeds up play. Two features matter far more than the rest of the spec sheet.
Fast, reliable target lock
Often marketed as "pin-seeking" or "flag lock" technology, this is what confirms you've actually locked onto the flag and not a tree or cart 20 yards behind it. A rangefinder that hunts or locks onto the wrong target repeatedly is genuinely frustrating on the course — this feature matters more than an extra 100 yards of maximum range you'll rarely use.
A slope toggle you can actually switch off
Slope-adjusted "plays like" distances are useful for casual rounds accounting for elevation change, but are not permitted under the Rules of Golf in competition. Make sure whatever you buy has a clearly switchable slope mode so you're not accidentally breaking a competition rule — and that the toggle is easy to confirm at a glance (an on-course indicator light, not just a menu setting).
Magnification and extras are secondary
6x magnification is standard and sufficient for the vast majority of golfers and distances. Extra features like slope, magnetic cart mounts, or vibration-based lock confirmation are worth paying for if genuinely useful to you, but shouldn't outweigh the two priorities above. See our rangefinders equipment guide for the full buying breakdown, including how a rangefinder compares to a GPS device.