Sony MZ-NF520D Net MD Walkman (White) Store 5 Hours of music on 1 standard MiniDisc Includes backlit LCD tuner/remote with editing functions Record MP3s or CDs at up to 32x speed Uses high-tech, affordable MiniDiscs (1 included) &lt;b&gt;NOTE:&lt;/b&gt; The MZNF520D's recording features and bundled software are not compatible with the Mac OS operating system.