Product Summary Massive Expansion: Get way more out of your MacBook's USB-C port, with 4k 30Hz HDMI, SD card connectivity, USB-A / USB-C data ports, as well as high-velocity pass-through charging with Power Delivery. SuperSpeed Transfer: Transfer music, movies, and more in seconds with 5 Gbps data speeds. SD Ready: Swap and sync nearly all SD card formats with the microSD and standard SD card slots.