Dual-Port Superspeed+ USB 3.1 Gen 2 Charging PCIe 3.0 Adapter Card Transfers data up to 960 MB/s from a single drive and up to 925 MB/s from each of 2 drives simultaneously Supports USB-C bus powered SSD, SSD RAID and hard drive devices with up to 15W (3.0A) power per port Supports Hot-Swappable device connection Add USB 3.0 Gen 2 to thunderbolt expansion systems