The picture below shows the type C connector cable. On the other end is the normal Type A connector. The Type C connector is reversible, thus you can plug it either way.
The USB 3.1 enclosure seen from the side. On the left is the USB Type C connector. There are 3 LEDs next to it. That is followed by a header for power switch and the last connector is a USB power
On the next page are some test results provided by ASUS, pairing up the device with their On board (X99), PCIe slot on PCH and PCIe on CPU.