Thunderbolt™ Adapter > USB 3.0 Type-A female + SD UHS-II Card Reader Thunderbolt™ male 7/7-64/8/8-64/8.1/8.1-64/ 10/10-64 Windows 10.9 Mac OSHot Swap Plug & Play 91723Chipset: Asmedia + RealtekSupports SD UHS-II memory cardsThunderbolt™ Adapter > USB 3.0 Type-A female + SD UHS-II Card Reader Performance Comparison40unit:Gbps USB3.110 USB3.05 USB2.0480 Mbps Thunderbolt™10 LxWxH: ca.83 x 68 x 14 mm7 cm WRITE SD write up to 260 MB/S READ SD read up to 200 MB/S PO WER USB bus powered max. 900 mA Current consumption 1.8A (5V) SD slotUSB 3.0 Type-A female