Connects eSATA compliant peripheral to your computer w/ ExpressCard Slot conveniently and easily. Compact hidden design to save space. Compliant with Serial ATA II specification. Backward compatible with SATA 1.0 specification. Data transfer rate up to 3.0Gbps. Compliant with ExpressCard Specification 1.0. Compliant with ExpressCard/34mm standard. Compatible with standard 34mm & 54mm ExpressCard slot. Supports 2.5" & 3.5" eSATA hard drives and eSATA drive enclosure. One end is eSATA 7P female connector and another end is standard 34mm ExpressCard. Plug & play and hot swapping capability. Supports Windows 2000 / XP /2003 / Vista / 7 / 8 & Linux. Package Content: 1X Brand New Hidden eSATA II ExpressCard 34mm Adapter. 1X CD Driver.