The A300 tracks your moves 24/7. It shows your steps, distance, and burned calories. Let the A300 guide you and show you different ways to reach your daily goal. Train to your own beat with Polar H7 heart rate sensor and make sure your every move is counted for. Keep up with the results in Polar Flow web service and app. The A300 automatically clocks both the moment you start sleeping and wake up. Gain a deeper understanding of your sleeping patterns in Polar Flow. Check Polar Flow for more details about your daily activity, training and sleep -– it’s both addictive and motivating!