What functions does Jiaming's new vivosport support and is it practical?

The sports bracelet should be regarded as the most expensive and practical sports watch. The biggest feature of this product is the built-in GPS, which can check the pace when running. At the same time, it is equipped with optical heart rate technology, which can monitor our heart rate changes 7X24 hours a day, 7 days a week, and the function is very practical.