Fiio X7 Mark II User Manual page 23

l) Display—Font Size
Choose the font size at your personal preference
m) Powertimer—Sleep
"Sleep" can be used to turn off the X7 after a set time, regardless of activity. This may be
useful for e.g. bedside listening.
The sleep timer may be set to any number of minutes between 0 (OFF; no timer) and 120.
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