Sony D-EJ756CK CD Walkman Portable Compact Disk Player Ultimate skip-free G-Protection(TM) Technology for flawless, smooth playback Can play CD / CDR / CDRW discs 1 button Playback control Up to 48 hours continuous playback with 2 AA alkaline batteries (not included) - May also be used with optional rechargeable batteries (not included) 64 track play programmability + 9 playback modes