The Garmin Dual Mode Heart Rate Strap transmits data via ANT+ and BLUETOOTH®, allowing you to track your heart rate with accuracy across all the most popular cycling apps like Strava, TrainingPeaks and Wattbike Hub with ease. The HRM-Dual features a soft strap that is comfortable, adjustable and easy to clean. Don't worry about keeping the HRM-Dual powered, the CR2032 battery lasts for up to 3.5 years.