1999 NW-MS7
The NW-MS7 is the first Network Walkman to use a Memory Stick as its storage medium.
2000
NW-MS9
The NW-MS9 is a second-generation Memory Stick Walkman, miniaturized from the NW-MS7. It supports 64MB Memory Sticks and ATRAC audio playback. It features an LCD display that can show track information.
