DCU Tecnologic 34157050 User Manual page 35

ENG
2. What should I do if the Bluetooth connection fails?
(Connection/reconnection failed or connection reconnection is slow)
Check if your device is iOS9.0 or Android 4.4 and above and if it
supports Bluetooth 5.0
Due to the problem of signal interference in Bluetooth wireless
connections, the time for each connection may change. If the connection
takes a long time, make sure the operation is performed in an
environment without magnetic field or multiple Bluetooth devices:
1. Turn off and on the Bluetooth of your Smartphone
2. Close the phone APP or restart the phone.
3. Do not connect other Bluetooth devices or functions at the same time.
4. Make sure the application runs normally in the background. If it's not
in the background, it may not be connected to the watch.
3. Can't find the watch on the Bluetooth connection?
Make sure it is turned on and activated, and that it is not linked to other
mobile phones. Then reset the clock. If it still doesn't work, turn off the
mobile phone's Bluetooth for 20 seconds. Then restart the phone's
Bluetooth.
4. Why should I wear my watch securely on my wrist to measure heart
rate?
The watch uses the principle of reflection of light. When the light source
penetrates the skin, it collects the signal reflected to the sensor to
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