Asus VivoWatch BP User Manual page 28

Heart rate screen
This screen shows your current heart rate. The PPG sensor on your ASUS
VivoWatch BP automatically determines your current heart rate.
To get more accurate results:
1. Wear the ASUS VivoWatch BP in a normal way with the watch face
facing up, the bottom of the ASUS VivoWatch BP touching your skin,
and the ASUS VivoWatch BP away from your wrist bone.
2. Wear your ASUS VivoWatch BP in a way without being uncomfortable.
Do not strap the ASUS VivoWatch BP too tight to your wrist.
3. You can get the most accurate results from the heart rate monitor
when you are warmed up.
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