Sony NWZ-W274S - Manual (Page 72)

If you have already deleted content transferred to your Walkman from
Media Go, transfer the content again from the Walkman to Media Go.
The voice guidance “Check the volume level” is heard.
An alarm (beep) and warning “Check the volume level” are meant to
protect your ears when you raise the volume setting beyond a specific
level (*1) for the first time.
You can cancel the alarm and warning by pressing any button.
You can turn up the volume beyond the specific level (*1) after canceling
the alarm and warning.
After the initial warning, the alarm and warning repeat for every 20
cumulative hours that the volume is set beyond the specific level (*1);
when this happens, the volume is changed to level [7] automatically.
(*1) Specific level = [18]
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