LIU JO LUXURY SWLJ Manual De Usuario página 33

2) Make sure that the smartwatch and the smartphone are not too far
apart. The connection must be made within 10 meters.
- The alarm / schedule reminder does not work
Make sure the settings have been "saved" after being changed in the
app.
- The heart rate value is inaccurate or cannot be detected
Make sure the heart rate sensor is clean and wear the device securely.
Do not move during the survey, sit down and maintain a correct
position in order to have a more accurate heart rate value.