File:WonderSwan MP3 front.jpg

Front of a WonderSwan Color with a WonderSwan MP3 cartridge, displaying MP3 playback software. Though shown at the Tokyo Game Show in Spring 2001, the MP3 device was cancelled. (see back)

Source

 * バンダイ、ワンダースワン用MP3プレーヤーユニット (Japanese) by Y. Fujiwa, AV Watch. 2001-04-03.