Sedna PCI Express (PCIe) SATA III (6G) SSD Adapter with 1 SATA III Port (with Built in Power Circuit, no Need SATA Power Connector, Best for Mac), SSD not Included Direct mounting of 2.5" SATA III SSd / Hdd on board One extra SATA III port for other devices Built in Power circuit, best for MAC where no power connector available Operating System Software can be installed on mounted SSD and booting of the OS from the installed PCIE disk is supported ( Your mother board BIOS need to support this feature ) Maximum capacity supported : 2T