Limiting the volume
You can use AVLS (Automatic Volume Limiter System) to limit the maximum volume.
Setting the operation sound
You can change the operating sounds of your Walkman.
Setting the screen off timer
You can set the time after which the screen is turned off when there are no operations. You can preserve battery power by setting this to a shorter time.
Adjusting the screen brightness
You can set the screen brightness to one of 5 levels. You can preserve battery power by setting this to a lower level.