It's a song track.  I like it, I wanted it, I bought it.  It is a quick way to get a single you want.  I use these as practice aids for band work.  The MP3 format is not optimum for real listening enjoyment.  In order to compress the data, a lot of tones are left out.  Even a good cassette tape outperforms this storage medium.  But it has its uses, and is inexpensive.