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SWITCHING OFF THE DISPLAY
Lock screen: you can set the time, never turn off the screen, or automatically turn off the display after
2 seconds of inactivity.
To adjust the time, press "ok", you can set 15 seconds, 30 seconds, 1 min, 2 min, 3 min or never
switch off.
BACKLIGHT
You can set 5 levels of backlight.
Press "back" to return to the main menu.
DEVICE INFORMATION
Press "menu" and select "Device information"