2000 NW-E3
The NW-E3 is the first Network Walkman to feature built-in flash memory.
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The NW-E5 is a higher-capacity member of Sony's first flash Network Walkman generation. It provides 96MB of built-in storage for ATRAC playback on its LCD display and achieved up to five hours from a single AAA battery. As a limited-production model, it sat alongside the NW-E3 as part of the core early flash E Series lineup.
The higher-capacity sibling to the first flash E Series models, it shows how Sony initially treated flash memory as a premium upgrade instead of an assumed baseline. It is part of the upper edge of the first flash generation. Same concept, just a little closer to practical everyday use.