Smartwatch S2, Smart watch S2 Pro, and Smart Watch S8 share similar functions. With the built-in heart rate sensor, the S2 will automatically track your heart rate and send it to the smartphone and tell the user if the user's heart rate has been raised or lowered. This can help users avoid illness and disease. With the built-in motion sensor, the S2 can automatically detect your daily movements. It will remind the user of important moments. It also supports automatic sleep tracking. When the user is asleep, the S2 will automatically remind the user of the time. The user can also set the goal and sleep goals. This can help users make their life more regular and healthy. Users will also be able to get more detailed information about their exercises.