How to Wear Xiaomi Mi Watch Lite
For daily use, comfortably tighten the watch around your wrist about one finger width away from your wrist bone. Adjust the strap to ensure the heart rate sensor can collect data normally.
Note: Wearing the watch too loosely may impact the data collection by the heart rate sensor.
Read more: https://manuals.plus/_mi/watch-lite-manual#ixzz7h06wzs16