The Sonnet Fusion Dual is a PCI Express 3.0 adapter card that allows users to add up to 32TB of extremely fast enterprise SSD storage to their system via a single PCIe slot. As its name indicates, you simply install the 2.5-inch U.2 (SFF-8639) NVMe PCIe SSDs in each of the two connectors, then pop it into an available x16 PCIe slot.  This unique adaptor card is specifically designed for video editors and others who need a high-endurance and high-performance storage option to put enterprise SSDs into their system.