In simple terms it is a device which has an amount of memory, 128-512Mb is
the typical range, which can be used to store MP3 audio files [usually by
connection to a computer] and then play back. They are very small items,
smaller ones can be about the size of a lady's lipstick, and one uses
personal headphones to listen to the music.
MPeg 1 Audio Layer 3 or more commonly, MP3 is an increasingly popular way to
store audio in electronic format.
The MP3 format compresses audio files in such a way that the file size is
relatively small, but the song sounds great: not as good as CD audio quality.
You can identify MP3 files because they end in the ".mp3" extension.
Typically 1 MB is equal to one minute of music or several minutes for spoken
word/audiobooks.
For more information, check out the site below
http://www.mp3.com
http://www.mp3.com/