How does the watch automatic heart rate detection function work?

How does the watch automatic heart rate detection function work?

This function can be set via Mi Fitness APP. There are four modes: turn off detection, assisted sleep detection, automatic heart rate detection, automatic heart rate detection + assisted sleep detection. In different modes, the watch battery life is different.
When the automatic heart rate detection is turned on, it will detect the heart rate throughout the day and significantly reduce the battery life. You can set the detection frequency by yourself: 1 minute, 5 minutes, 10 minutes and 30 minutes.
Setting path：
Mi Fitness APP：My->Mi Watch->heart rate detection->select mode to set the frequency
 

Does it help?

Yes
No