Compatible with all pioneer radios using IP-bus accessory connection. Older Pioneer M-bus radios are not compatible. Consult with you manual to find out if your radio is compatible. In order for the Aux-audio input to be operational it first must be set in the radios menu options for AUX function. Connection of a CD changer is not possible when using the PXRPIO. The changer port will be occupied by the PXRPIO. It can be used I. Place of the CD-RB10.