Garmin Approach CT10 club trackers lets you know how far you consistently hit each club and also which club you hit for every shot during every round from tee to green, Add sensors to your wedges and putter to track chip shots next to the green and your putts, and rely on your compatible watchs AutoShot feature to track your other shots. The lightweight and secure sensors easily attach to the end of a clubs grip. You wont even know the sensors are there while you play. But after a couple of rounds, youll be glad they are. An ingenious automatic on/off feature helps provide battery life of up to 4 years. When its time to replace batteries, you can easily do it yourself.