Sony NW-A25 How To Use Manual page 237

Help Guide
[Check the volume level] is displayed.
An alarm (beep) and a warning [Check the volume level] are used to
protect your ears when you turn the volume up to a level that is harmful
to your ears for the first time. You can cancel the alarm and warning by
pressing any button.
You can turn up the volume 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 to a level that is harmful for
your ears. When this happens, the volume is turned down
automatically.
237 sur 237
http://helpguide.sony.net/dmp/nwa20/v1/en/print.html
08/06/16 16:25