SONY Portable CD CD Walkman [D-NE730] Black This is a vintage CD Walkman made by Sony. I was able to confirm that it can play CDs, skip tracks, and output sound. It can operate with both a gum battery and an AC adapter. A remote control (RM-MC53EL), AC adapter, and earphones are included. *Gum battery is not included. Please note that due to its age, there may be scratches and dirt.