Star Tech.com 2-Slot USB (Universal Serial Bus) 3.0 SD Card Reader with UASP USB (Universal Serial Bus) SD Card Reader USB (Universal Serial Bus) 3.0 SD, SDHC, SDXC TAA Compliant Portable Features Save time & access two SD cards simultaneously with this USB (Universal Serial Bus) 3.0 SD card reader Experience fast read/write speeds with USB (Universal Serial Bus) 3.0 (5 Gbps) on each slot 70% faster transfer speeds with UASP support, when connected to a UASP compatible host