AUKEY USB C Hub with 4K HDMI, SD & microSD Card Reader, 3 USB 3.0 Ports, Type C Charging Port for MacBook Pro, Google Chromebook, iMac 2017 & More Solid aluminum body with attractive rounded cylinder and ultra compact design makes it a perfect match to your PC like the new MacBook 12 Inch and Google ChromeBook Pixel. Easy for carrying. Add four USB 3.0 ports to your USB Type-C devices. And the USB 3.0 Ports support ultra-fast data transfer rates of up to 5Gbps (10 times faster than USB 2.0). Has over-current protection built into each port to protect both connected devices and your hub from power surges. USB Bus-Powered, no additional power adapter. No driver needed, plug-and-play, support hot-swapping. Package contents: Aukey CB-C12 USB Type-C to 4-Port USB 3.0 Aluminum Hub, User Manual.