The Polar M430 integrates state-of-the-art running metrics, advanced GPS and optical heart rate technology with a wrist-based heart rate monitor. Track your speed, distance and pace in and outdoors with the latest GPS and accelerometer technology. The M430 has timing features such as interval timers, stopwatch and finish time estimator. Smart Coaching deliver the tools for you to achieve your goals. Do more than run with the Polar M430 and pick the right sports profile for every training session. The M430 records your steps, distance, calories burned and sleep. The Polar sleep technology automatically detects the timing, amount and quality of your sleep.