The Polar M430 HR tells you everything about your daily activities and workouts. The integrated heart rate sensor accurately measures your heart rate via your wrist. This gives you insight into your heart rate zones so you can train more effectively. The sports watch also measures your speed, distance, calories burned, sleep, steps, and height. Thanks to the GPS sensor, you can see exactly where you've been. Incoming calls, messages and notifications from your smartphone appear on the watch's screen, so you won't miss a thing while exercising. Want to cool off in the swimming pool after your training? You can keep the M430 HR on, because the sports watch is waterproof.