With the Polar A370 around your wrist, it's easy to sport more effectively and live more healthily. The activity tracker measures your heart rate throughout the day, which gives you a detailed overview of your heart rate pattern. This makes it easier for you to train with the right intensity. The A370 also measures your burnt calories, steps, speed, and distance. The color touch screen of the tracker shows your incoming calls, messages, and notifications from your smartphone. Are you having trouble to find the right balance between activity and rest? With the A370 and accompanying app, you can improve the quality and duration of your rest during the night. This wil help you to be fit during the day, so you can smash your goals.