The Garmin Approach S42 GPS is a GPS golf smartwatch that puts information from more than 42,000 course maps worldwide on your wrist. The Green View feature allows manual pin positioning so you can quickly reference distances to the front, middle and back of the green as well as hazards and doglegs. The AutoShot round analyzer measures and auto-records detected shot distances. You can also pair the watch with optional Approach CT10 club tracking sensors (sold separately) for more automatic game tracking capabilities. Pair with the Garmin Golf app2 for strokes gained analysis, participate in leaderboards and tournaments and gain more insights into your game.Wear the watch all day, and get smart notifications and activity-tracking features. (Unit Dimensions: 43.4 x 43.4 x 11.7 mm)