The mini cd has the characteristic of being smaller than a normal cd, in fact a normal cd has a diameter of 12 cm, while that of the mini cd is 8 cm.
The small size, combined with a storage capacity of 210 Mb, make it suitable for containing multimedia presentations, catalogs, etc.
It can be played in all drawer CD players (such as those of PCs), but not always in audio CD players such as vehicle ones.