PRECISE PERFORMANCE Featuring an advanced detection algorithm, TRACKR HEART RATE provides accurate real-time heart rate data to enhance training efficiency and support optimal performance. POWERED TO ENDURE TRACKR HEART RATE is equipped with a high-capacity rechargeable battery with over 100 hours of active battery life, ensuring you're always ready to train. Whether it's a marathon training session or an epic cycling tour, TRACKR HEART RATE stays powered for the long haul. COMPLETELY CONNECTED With ANT+ and Bluetooth connectivity, TRACKR HEART RATE makes it simple to connect to a smartphone, broadcast to a wide array of fitness equipment, and sync to the most popular training apps and accessories.