NWD-W252

The NWD-W252 is a clip-style W Series Network Walkman. It prioritized lightweight wearable playback. With 2 GB storage supporting MP3, AAC, and WMA files, it uses a lithium-ion battery for 11 hours and includes ZAPPIN for quick previews.

This model continues Sony's wearable Walkman idea, where the player disappears into the headphones instead of being carries separately. The storage and interface are minimal, but the concept is the point. Sony was trying to remove the sense of "using a device" altogether and turn listening into something more immediate and physical.