Add two PCI Express 3.0 x16-capable cards and expand the potential of a Thunderbolt 3 or 4-enabled laptop, desktop, or all-in-one system. With this Thunderbolt 3 PCIe expansion enclosure, you can utilize the wide range of PCIe expansion cards with computers that do not have PCIe slots. You can connect an external display to the enclosure via the DisplayPort or Thunderbolt 3 ports, which support Ultra High Definition (UHD) 4K or 8K resolutions.