Garmin Approach S20 Golf GPS Rangefinder Watch All tested and working. In good condition (see photos). The Garmin Approach S20 Golf GPS Rangefinder Watch is a high-tech device designed specifically for golf enthusiasts. With GPS sensors, it provides accurate distance measurements to help users improve their game. The sleek black design adds a stylish touch to the functionality of this golfing accessory. Developed by the trusted brand Garmin, the Approach S20 is a must-have for golfers looking to enhance their performance on the course.