iogear eSATA 3Gbps 2-port ExpressCard/34. Host interface: ExpressCard, Output interface: SATA. Data transfer rate: 3 Gbit/s. Width: 33.02 mm, Depth: 113.03 mm, Height: 20.32 mm. Package weight: 181.4 g. Connectivity technology: Wired, Package dimensions (WxDxH): 241.3 x 44.45 x 158.75 mm, Compatible operating systems: Windows 2000, Windows XP, Windows Server 2003 Windows Vista 64 bit / 32bit Mac OS X 10.4