With this product, you can expand your USB 3.0 connection by linking the 19-pin header on the mainboard to a 20-pin receptacle, commonly referred to as a 19-pin connector. This adapter allows connection from one to two USB 3.0 female ports on a panel to the mainboard using a 19-pin/20-pin flat cable. You can use a USB 3.0 to USB 3.0 (20-pin) cable to directly connect to the mainboard. The USB 3.0 female connector can be securely mounted with screws, and the USB 3.0 port connects via a 19-pin/20-pin cable. Note: Due to the physical connection method, compatibility may vary with certain motherboards, and some may not support this adapter. Due to variations in manufacturing batches, the color of the plastic housing at the joint may differ slightly from the image shown. Color: Black Material: PVC + Copper Wire Size: Approximately 15 cm in length Package Contents: 1 x USB 3.0 Extension Cable The package includes only the items listed above; other products are not included. Note: Lighting conditions and display settings may cause slight differences in color between the image and the actual item. Measurement tolerance is +/- 1-3 cm.