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It's a Walkman. Granted, it's one that requires you to put in a CD, rip the tunes and then copy them to the device, rather than just popping the disc or cassette in.
Or you can buy the tunes at a buck a pop.
OK, it's like a Walkman but harder and more expensive to use, with mediocre, compressed MP3 sound, to boot.
This is a revolution? Feh.
Charlie