– The unit cannot play discs that contain data other than MP3 and CD-DA data. – Do not attach any seal or label to either side (the labeled side or the recorded side) of a disc. – Do not use irregularly shaped CDs (e.g., heart-shaped or octagonal). The unit may malfunction. DVDs and Video CDs Some playback operations of DVDs and Video CDs may be intentionally fixed by software manufacturers. As this unit plays DVDs and Video CDs according to disc content designed by the software manufacturer, so