The Kanguru eSATA/USB ExpressCard features an eSATA/USB combo port that supports eSATA, Powered eSATA and USB 2.0 connections through a single port. The eSATA/USB combo port gives you the convenience of USB connectivity along with the high-speed transfer rate of eSATA connectivity. It also supports Powered eSATA connectivity, allowing you to connect Power eSATA compatible devices without an external power source, eliminating the need for extra, obtrusive cables.