Adds Fast SSDs to Your System—Mounts one or two high-performance 6 Gb/s SSDs (sold separately) in your Mac Pro's, desktop PC's, or Thunderbolt expansion chassis' PCIe slot High-Performance PCIe Interface—PCI Express 2.0 x2 host bus interface for high-performance applications Data transfers speeds up to 660 MB/sec Enables installation of a single SSD in half length card spaces, two SSDs in full length card space when extension plate is attached to the card 2-year warranty and free lifetime technical support since 1986