NW-S764K

The NW-S764K added speaker support to the ninth-generation S Series with Bluetooth. It uses the updated E050-style body. With 8 GB storage supporting MP3, WMA, AAC, and WAV files, video, and photo, it includes a 42-hour battery, WM-PORT, Clear Phase, Bluetooth, and built-in speaker.

This player extends the same S764 platform into an accessory-driven retail package. The underlying player was already stable, so Sony could build around it instead of redefining it.