512 MB of memory plays back over 8 hours of MP3 (16 hours of WMA) music (over 120 MP3/240 WMA songs), Supports Microsoft PlaysForSure Downloads and Subscription, FM tuner (20 preset stations), Voice recording with built-in microphone, Up to 19 hours continuous playback using one AAA Battery, Indigo backlit LCD provides ID3 Tag information, Hi-speed USB 2.0 connects to almost any computer for hi-speed music transfer (backwards compatible to USB 1.1 ports).