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Sony Walkman X Series (NWZ-X)
Sony NWZ-S639
Sony Walkman NWZ-E453
Sony Walkman NWZ-X1051
Sony NWZ-W252
Sony Walkman X Series 32 GB Video MP3 Player
Sony NWZ-S639  16 GB  Digital Media Player
Sony Walkman NWZ-E453 (4 GB) MP3 Player
Sony NWZ-X1051F  16 GB  MP3 Player
Sony NWZ-W252 MP3 Player
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Release Date
May 2009
Aug 2009
Sep 2010
Jan 2010
Apr 2010
Video Format
MPEG-4,H.264,WMV
MPEG-4
MPEG-4, AVC(H.264/AVC)
AVC, H.264, MPEG-4, WMV, DRM
MPEG-4, H.264, MP4
Main Storage Type
Built-in Memory
Built-in Memory
Built-in Memory
Built-in Memory
Built-in Memory
Storage Capacity
32.0 GB
16.0 GB
4.0 GB
16.0 GB
1.68 GB
Expansion Slots
Internal Flash Drive
microSD Card
Without Expansion Slots
Family Line
Sony WALKMAN
Sony WALKMAN
Sony WALKMAN
Sony WALKMAN
Number of Songs
8000.0
4100.0
880.0
4000.0
470.0
Use
Music, Video, Photo Viewing
Music, Video, Photo Viewing
Music, Recording, Photo Viewing, Video
Music
Music
Average Rating
 3.9 stars
 4.4 stars
 4.0 stars
 3.8 stars
 3.1 stars
Interface
66% Positive
34% Negative
66% Positive
34% Negative
100% Positive
100% Positive
Audio
92% Positive
8% Negative
100% Positive
100% Positive
100% Positive
Image
100% Positive
60% Positive
40% Negative
100% Positive
Battery
100% Positive
100% Positive
100% Positive