Fiio X3 Complete User's Manual page 12

d) Key-lock setting
There are three button settings on the Key-lock setting interface: Multifunctional button, OK button
and Prev/Next button. You could use the scroll wheel and confirm button to set the button on/off
to your preference.
When the button is set to ON, under lock-screen, this button could function; when it's set to OFF,
this button couldn't function under lock-screen.
Note: under lock-screen, click the volume button to adjust volume and long press the volume button
to switch.
e) Screen Timeout
The X3's screen will be turned off and its buttons disabled (according to the key lock option) if the
buttons have not been touched after the period of time specified here. You can choose between 30,
40, 50, 60, 90, and 120 seconds as well as ON (the screen and buttons are never turned off). Press
the Enter key to enter this sub-menu and use the scroll wheel to adjust this setting.
f) Brightness
Press Enter to enter this sub-menu. Use the scroll wheel and Enter button to choose from 10
different levels of brightness.
g) Idle Standby and h) Idle Standby Timer
If ON is selected for the Idle Standby setting, then the player will automatically turn itself off if it
has not been playing music and has not been touched after a set amount of time. To change this set
amount of time, highlight the Idle Standby Timer option and press Enter to reach a sub-menu
where you can choose from 1 minute to 8 minutes.
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