If you are familiar with Net MD, it is Sony's answer to MP3 players on a Minidisc. I bought it for my mother who was going to use it as she went jogging, but she just couldn't figure it out. Well, she's barely got the Digital Cable figured out soooo... Anyway, here's the official specs: High Speed Net MD™ Walkman. Player/Recorder • Record MP3s Or CDs At Up To 32X Speed* • Car Kit Accessories Supplied • Charging Stand Supplied • Rechargeable Battery (NC-WMAA) And AC Adapter (AC-ES305) Supplied • Remote Control With Editing Functions Supplied • Utilizes Affordable MD Media For Over 5 Hours Of Music Storage On One 80 Minute Disc (LP4 Mode) • Up To 56 Hours Playback In LP4 Mode (One “AA” Battery) • Up To 20 Hours Playback With Rechargeable Battery (LP4 Mode) • Internal Battery Compartment Holds One “AA” Type Battery • “Easy Skip” Group/Folder Function • Plays Back In ATRAC3™, Supports Multiple Internet Audio Formats (MP3, WMA, WAV) Compatible With Windows. 98/98SE/2000/Me/XP Operating Systems • Music Management Software Supplied • New Net MD Simple Burner Quick Rip™ CD Dubbing Application Supplied • Ability To Record From Multiple Sources (PC, Portable CD, Home CD Unit, Radio) • MDLP Long Time Stereo Recording And Playback (Up To 320 Minutes/Over 5 Hours Of Music) On One 80 Minute Disc (LP4 Mode) • Ultimate Skip-Free** G-Protection™ • Digital Sound Preset • Multiple Playback Modes • Easy Pop-Up Eject Mechanism • Remaining Recording/Playback And Battery Time indication On Unit LCD • Automatic End Search Recording Function I have everything that came with it as well as a 4 year warranty from Best Buy that expires on 8-12-06. The unit retails for $199 new, but I will let it go for $160 shipped. It has had VERY little use on it, no more than 3 or 4 hours tops.