This surface pro 9 adapter allows you to extend 2 monitors which provide more space for work and you can do different project on different monitors. Specially designed for Pro 9/Pro10/Pro11/ProX: This Surface Pro 11 usb hub specifically developed for Microsoft Surface Pro 9/Pro10/Pro11/ProX, which turns the 2 USB-C connection into 6 ports (2 X USB 3.0 ports, 1X 4K HDMI, 1X USB C data transfer, 1X SD card reader slot, 1X TF card reader slot）( Note 1: This Surface Pro 11 hub won't fit your Surface Pro 9/Pro10/Pro11/ProX very well if you use an protective case. ).
eBay