1: The use of wire modular design makes it more convenient to use and the desktop cleaner and more aesthetically pleasing. 2: High quality chips provide faster data transmission and more stable connection quality, expandable with two USB 3.0 interfaces and support for hot swapping. 3: Multiple protection functions to protect equipment and data from the impact of power, overcurrent, overheating and other problems, suitable for home, office and business environments Colour:Black Material:PVC+copper wire Size:Line length 20cm Package Contents: 1 * Connecting line 1 * expanding board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.