Amazon's MP3 store sells DRM-free MP3s of entire musical albums, ripped at a very high bit rate and with digital copies of the cover art. Because there's no DRM, the files can be played on any portable media player, which has helped Amazon become one the top five music sellers worldwide.
Tracks are available for sale individually or by the album. In order to complete a purchase on the store, users must install a small helper program that lets you download several tracks at the same time. It will also automatically take the tracks and add them to your iTunes and/or Windows Media Player libraries.