LaCie PCI-Express/2 x SATA II. Host interface: PCIe, Output interface: eSATA. Data transfer rate: 300 Mbit/s. Width: 105 mm, Depth: 123 mm, Height: 23 mm. Colour of product: Black, Orange. Connectivity technology: Wired, Compatible operating systems: Windows XP, Windows Vista, Windows 7 / Mac OS X 10.5, 10.6