2005 NW-A1000
The NW-A1000 is a Walkman with a hard disk drive, part of the first generation A series.
2011
NWD-W263
The NWD-W263 is a high-capacity wearable configuration model part of the W series. It features 4GB of internal storage and supports MP3, AAC, and WMA audio playback formats. It supports approximately 11 hours of playback with a lithium-ion battery and has the ZAPPIN function. It is a self-contained configuration using internal storage and does not require external media.
