A software is necessary to conveniently arrange the tracks in the playlists and in the correct order, because if you would simply copy MP3 files to a memory card, the player would still not know in which order it should play them from which button. Another advantage is that you can also use files in OGG, WAV or FLAC format and directly from audio CDs as source material, or other common formats, which is not possible with most MP3 players. Instead of referring to hörbert as an MP3, Ogg, WAV and FLAC Player, only the term "MP3 Player" can be used as category or generic name. Otherwise you would not find our hörbert in any shop, because there is not even a category for "Audio-Player", but at most "MP3-Player". The term "universal audio player for children" would of course be quite correct. But we have to meet the potential customers looking for a player and limit ourselves here to the term "MP3 player" as a generic term, although hörbert can do much more.