Argosy 320GB Mobile Video HDD. Hard drive rotational speed: 7200 RPM. Video compression formats: Xvid, Subtitle formats supported: ASS, PSB, SMI, SRT, SSA, Audio formats supported: MP3, WAV. Video D/A Converter (DAC): 10-bit/54MHz. Width: 196 mm, Depth: 58 mm, Height: 126 mm. Power requirements: 100-240V, 50/60Hz, Compatible operating systems: Windows 98SE/Me/2000/XP/Vista, Hard drive capacity: 320 GB