Acomdata PureDrive. Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM, Drive device, buffer size: 8 MB. Colour of product: Grey. Width: 188 mm, Depth: 111.7 mm, Height: 32 mm. Operating temperature range (T-T): 5 - 35 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 5 - 95 %. Minimum processor: 233 MHz, Minimum system requirements: Windows Vista/XP/2000/ME/98SE Mac OS 10/2+ eSATA, Mounting: Vertical/Horizontal