LifeSpan MARATHON - System Upgrade and Data Reset

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Use “UP”, “DOWN” buttons to select the options, press “ENTER” button to choose online
upgrade option, the display interface is as follows
In case there is a new version, the interface will prompt that the current system has the latest version, and the user
can update the version as needed.
Use "LEFT" and "RIGHT" buttons to select the options and perform the corresponding operations.
Select the system restore and press "ENTER" button, the display interface is as follows
Press "ENTER" button to enter the factory data reset interface.