You can use AVLS (Automatic Volume Limiter System) to limit the maximum volume.

The volume is moderated between songs to minimize the differences in volume level. When continually playing back songs that are recorded at different levels, this function prevents large differences between volume level from occurring.

Formats the built-in flash memory and deletes all the data of your Walkman.

The Walkman logo on the side of headphones lights according to the operation of your Walkman. You can change the settings to turn these illuminations off.