NitroAV Fusion Pro 5-port eSATA FireWire800/1394b Combo Pcie(x4) Professional Host Adapter Designed for Optimum Performance and Connectivity! 2x eSATA External Ports. 2x 1394b External Ports/ 1x Internal. Latest- fully IEEE 1394b OHCI compliant, TI XIO2213 Chipset PCI-Express x4 Bus(4 Lane)