About File Formats
RealAudio files require the free real player
from http://www.real.com . They are usually
around 2MB. They can be played or burned to a CD with the free player.
MP3 Files require the free WINAMP program from http://www.winamp.com
, Windows Media Player, or any other program that can play MP3. They are
usually around 6MB. (Check out this link if you need rechargeable batteries)