Features: 1.Usb 3.0-5gbps ultra-high-speed transmission, 1 usb 3.0, 1 type c 3.1 and 1 4k hdmi female expansion port, meet the transmission, charger requirement.  2. Could connect with plenty of usb and charging to MacBook.  3. Type-c upper and lower end interface is exactly the same, don't have to...