With the Amazfit GTS 3, all-day SPO2 monitoring1 and precise heart rate monitoring is made possible. Stress levels as well as sleep can also be monitored and recorded using this smartwatch.There are over 150 different sports modes available to log workouts individually. With over 100 stylish and dynamic watch faces as well as 15 animated watch faces, the design of the Amazfit can be changed and individualized as desired. Likewise, one's own photo can be uploaded and used as a background image.