Sony Super Slim Digital Flash Voice Recorder (Black) Stereo Voice and Music Recorder Up to 178 Hours Recording Capacity Plus Music Player, 4 GB Flash Memory Built in Stereo Mic & Earphone Jack Easy Search Rewinds or fast forwards in short increments making it easier to locate a segment in a long recording for review. Operating System Compatibility : Windows 7 Ultimate, Windows 7 Professional, Windows 7 Home Premium, Windows 7 Home Basic, Windows 7 Starter, Windows Vista Ultimate Service Pack 2 or higher, Windows Vista Business Service Pack 2 or higher, Windows Vista Home Premium Service Pack 2 or higher, Windows Vista Home Basic Service Pack 2 or higher, Windows XP Media Center Edition 2005 Service Pack 3 or higher, Windows XP Media Center Edition 2004 Service Pack 3 or higher, Windows XP Media Center Edition Service Pack 3 or higher, Windows XP Professional Service Pack 3 or higher, Windows XP Home Edition Service Pack 3 or higher, Mac OS X (v10.3.9-v10.6), pre-installed.