2008 NW-A828
The NW-A828 is a Network Walkman with flash memory, part of the 4th generation A series.
2011
NW-S764BT
The NW-S764BT is a Bluetooth headphone-included model part of the 9th 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.
