Often called mp3, because most of the songs are available in this format, but also these players support formats such as WMA, ATRAC, AAC, last ESOT developed by Sony and Apple respectively.
I remember getting my first audio or MP3 player when I was in first year of middle school. At first I took no more important and I used to use it only when I was really bored. Over time this was becoming a highly valued obejto my life, in any case essential .... but important, because it makes my trips to my house (in San Felipe) and back to Santiago but boring.
Currently I have a very small fuchsia and accompanies me everywhere