2004 NW-S21
The NW-S21 is a Network Walkman from the second-generation S series, specifically designed for sports use.
2001
NW-S4
The NW-S4 is the first Network Walkman in the S series, specifically designed for sports use. It features 64MB of built-in flash memory and supports ATRAC3 format audio playback. It has a single-line monochrome OLED display and is configured for long battery life with a single AA battery.
Related Network Walkman
Sony portable audio in 2001
2001 MZ-E600
The MZ-E600 was a MiniDisc player that supported MDLP and offered improved stability and ease of use.
2001 WM-EX921
The WM-EX921 is a playback-only Walkman equipped with an automatic inversion function.
2001 D-E666
The D-E666 is a portable CD player equipped with an electronic anti-skip mechanism using G-Protection.
