Sony Portable Mini-Disc Player/Recorder (MZ-R500PCNAVY) MDLP (MiniDisc Long Play) allows up to 5 hours of music on one minidisc Flexible editing (add text, combine, divide, move, erase) Level control for consistent recordings Up to 48 hours of playback with one AA battery (in LP4 mode) Digital Mega Bass Boost for full, rich low-end