Marantz CDR633 Slot Loading Professional CD Recorder & Player CD-R and CD-RW Recorder and Player with new worry-free slot-in mechanism Compatible with most discs - CD-R data, CD-R for digital audio, CD-RW data, and CD-RW for digital audio Marantz Minute Track with Adjustable Time - or Level-dependent Auto Track Increment Plays MP3s for hours of playback from one disc, MP3 directory navigation Analog and Coaxial / Optical (S/PDIF) digital inputs and outputs