Koramzi CD55-BKG portable CD boombox Full Range Stereo Sound System has top loading CD player . This system can playback all digital audio CD, finalized digital audio CD-Recordable (CD-R) discs, finalized digital audio CD-Rewritable (CD-RW) discs and CD-DA format digital audio CD/CD-R/CD-RW discs. Programming tracks of disc are possible when playback is stopped. Up to 20 tracks for CD disc can be stored in the memory in any order. You can play one track or all tracks on the disc repeatedly. For private listening, insert a 3.5mm headphone (not included) into the HEADPHONE jack.