2005 NW-A1000
The NW-A1000 is a Walkman with a hard disk drive, part of the first generation A series.
2010
NWD-W253/Z
The NWD-W253/Z is a color variation model part of the W series. It features 4GB of internal storage and supports MP3, AAC, and WMA audio playback. It supports approximately 11 hours of playback with a lithium-ion battery and has the ZAPPIN function.
