- Turn your iPhone 4S / 5 / 5S / 5C or phone with Android 4.3 or higher with Bluetooth 4.0 support into your own personal trainer with Sports Tracker HRM SMART. The Sports Tracker HRM SMART let’s you adjust your training intensity to fit your personal fitness goals. This highly accurate heart rate monitor with Bluetooth SMART technology brings real-time heart rate data into Sports Tracker’s award winning iPhone platform. Heart Rate training ensures the most efficient results, whether your goal is to improve power, build endurance, or lose weight.- Bluetooth SMART compatible- Accurate real time heart rate measurement- Enhanced connection range of up to 20 meters- Reliable fast connection- Comfortable textile strap- Replaceable battery with long battery life *(up to 1.5 years, when used 1h/day)- One year warranty - Phone compatibility on the Specifications Sheet