Apple Watch Series 2 with built-in GPS lets you leave your iPhone at home when you go for a run or ride and still measure your workout accurately. With built-in GPS, Apple Watch Series 2 can record precise distance, speed, and pace while you?re walking, running, or cycling outdoors. A custom sensor continuously measures your heart rate while you use the Workout app. Apple Watch Series 2 is rated water resistant 50 meters,1 so you can leave it on when you?re in the pool or ocean. Apple Watch Series 2 accurately measures your movement. Select up to five metrics to view at once, automatically pause a run, and even mark segments.Apple Watch Series 2 with built-in GPS lets you leave your iPhone at home when you go for a run or ride and still measure your workout accurately. With built-in GPS, Apple Watch Series 2 can record precise distance, speed, and pace while you’re walking, running, or cycling outdoors. A custom sensor continuously measures your heart rate while you use the Workout app. Apple Watch Series 2 is rated water resistant 50 meters,1 so you can leave it on when you’re in the pool or ocean. Apple Watch Series 2 accurately measures your movement. Select up to five metrics to view at once, automatically pause a run, and even mark segments.