USB 3.1 Adapter 20 Points Type A on Internal USB 3.0 USB3 19 Points Female connector.

Functions:

Active chipset enables full USB-C features, preserves the functions of Channel Configuration pins (CC1&CC2); including attach/removal detection, plug orientation detection, and current advertisement. Also the communications required by the Power Delivery and Alternate Mode.
Connector 1 (motherboard) : USB 3.0 Internal IDC 20 Pin MB Male Housing Header
Connector 2 (front panel) : USB 3.1 A-Key 20 Pin Front Panel Female Header /
NOTE: Does not convert from 5GB/s to 10GB/s. Not compatible with USB 2.0 motherboard IDC connector
Note on USB current over limit issue: The power from the USB 3.0 header on the motherboard has a power rating at 4.5W (0.9A x 5V). However, many USB-C devices can withdraw power up to 100W (20A x 5V). This may result in a power shut down to protect the motherboard and its components. Devices such as iPad Pro and other tablets should not be charged through this port.