The term MP3 refers to the way computers can squeeze a large CD track into a much smaller size. The greater this compression, the smaller the size of the song, but this also means lower quality sound. You can adjust this easily, but the standard compression is 128KB.

• Small and compact
  MP3 players have shrunk in size in recent years, and you can now get feature-packed models without spending a lot of money. They’re great for taking to the gym, and with an average capacity of 1 or 2GB, that’s more than enough for a decent workout!
• Mid-level
  These players go one step further, with larger capacities and colour screens. They often have photo and video playback as well, which means you can watch all your favourite multimedia, even on the go.
• Premium
  As well as larger capacity and video playback, these top-ofhe-range multimedia players have a host of additional features. Some have built-in FM radio or Bluetooth connectivity, while others offer wi-fi internet access or memory card slot for increased capacity.