lICENSE REKORDBOX

Rekordbox DJ is a paid upgrade on the XDJ-RX, it comes included on the DDJ-RX and DDJ-RZ.

mmmhh realLy?  :/ 

so, why you can find a serial key back of the xdj rx? what i can do with this serial key??

that cd key was probably used for version pre 3.0 that needed a key to use rekordbox, now it works off your KUVO account so the key on the back of the unit is no longer needed

Yes, that is the case.  You can try the 30 day free trial and if you like it then buy the software..

ok, thank u guys ;)

@Αλέξανδρος Γιαννίκος > I think you mean a serial number not key. That is to identify the product, not to unlock software.