Starting off with the A360 this is a wrist-based heart rate monitor that keeps you in the right heart rate zone whether you are circuit training, cycling, jogging or even walking, as well as the heart monitor the A360 also tracks your steps, calories, training and sleep patterns and the Activity Guides give you feedback. You can link the A360 to your phone so it will vibrate on your wrist when you get a message or phone call or to remind you of an important date in your calendar.