The Polar VANTAGE M is great even for the most demanding users. Featuring Polar Precision Prime™ technology for precise heart rate monitoring even in difficult conditions. With more than a hundred sports to chose from and adapt to your liking. The Polar Flow service includes an online training calendar with analyses, progress reports, training logs, or sleep log. Easy to synchronise with other apps - Strava, TrainingPeaks. Replaceable straps (not included).