This can happen for various reasons. The quality of the connection between Bluetooth devices diminishes gradually as the distance or number of obstacles increases. Update timings depend on the quality of this Bluetooth connection. Make sure that both devices are close together to ensure a smooth update process. We also recommend clearing unnecessary connections to other devices on your smartphone.
Important: Connect Kiox to an external power supply during the update process.
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Further information and instructions for use can be found in the corresponding owner's manual.