2007 NW-A808
The NW-A808 is the Network Walkman with the largest flash memory capacity part of the second-generation A series.
2009
NW-S644/PI
The NW-S644/PI is a color variation model part of the 7th generation S series. It features 8GB of built-in flash memory and supports MP3, WMA, AAC, and WAV audio playback formats. It has a 240x320 TFT display and is powered by a lithium-ion battery.
