Hi folks, you only need to use the kit if you are useing sd jukebox 2.4.If you use sd jukebox 5 or above any card reader/writer will allow you to put cd audio files on a sd card and play them on your KN7000, plus the bonus thak there is NO check-out limit as this Jukebox ver. was for Personial players many of which were not for sale outside of Japan ,so their manuals etc: is only in Japanise. all the other funtions such as file maneger work with any Good card reader, If you are not useing MIDI files Freds SD explorer is fantastic. regards John