2007 NWZ-S515
The NWZ-S515 is a lower-capacity model part of the NWZ generation S series.
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The NWZ-E463 is part of Sony's continuing E Series Network Walkman. It carries forward the multimedia and audio-processing features from prior years. With 4 GB storage supporting MP3, WMA, AAC, and WAV playback plus video and photo, it uses a 240x320 TFT display and lithium-ion battery for 50 hours. FM radio and WM-PORT were standard, with DSEE, Omakase Channel, and Lyric Pita.
The E463 comes from one of the strongest late E generations, where Sony had already settled what the line was supposed to be. Earlier versions of the E Series often drifted between identities, but by then the direction is clear: compact, low-friction, and modest without feeling unfinished. This model benefits from that clarity.