Originally Posted by
Wikipedia
Nintendo MP3 Player
Main article: Play-Yan
The Nintendo MP3 Player (a modified version of the device known as the Play-Yan in Japan) was released on December 8, 2006 by Nintendo of Europe at a retail price of £29.99/€30. The add-on uses removable SD cards to store MP3 audio files, and can be used in any device that features support for Game Boy Advance cartridges; however, due to this, it is limited in terms of its user-interface and functionality, as it does not support using both screens of the DS simultaneously, nor does it make use of its touch-screen capability. It is not compatible with the DSi, due to the lack of the GBA slot.