User's Manual

4.5 This watch measures your heart rate dynamically. Thus, it gives different heart rate
values when you are in different states (talking, eating, and drinking). The real heart rate
value depends on the actual situation.
4.6 After connecting your watch to the APP, you can set the maximum heart rate warning
value and synchronize it to your watch. Then, when the heart rate value on your watch
reaches the maximum heart rate value, your watch will vibrate to give a prompt and at
the same time, the heart rate value will flash, telling you to stop intensive exercise.
4.7 If you are not clear of your maximum or minimum heart rate, please consult your
doctor before taking exercise.
4.8 Before making a measurement, ensure that there is no contamination at the bottom of
the heart rate sensor. Such factors as skin color, thick hair, tattoo, and scar may affect the
detection result.
4.9 This heart rate detector works according to the PPG measurement principle.
Therefore, its precision may vary with the physiological factors (blood circulation, blood
pressure, skin conditions, blood vessel location and density) which affect light
absorption and reflection. When the measured heart rate value is very great or very small,
the measurement value may be incorrect and you need to make another measurement.
4.10 Long-time measurement may cause the watch to get hot. If this makes you
uncomfortable, you can take the watch off your wrist and wear it again after it has cooled
down.
4.11. You are recommended to make measurement when it is warm because cold weather
may affect the measurement result.