Specially designed for Pro 9/Pro10/Pro11/ProX: This Surface Pro 11 usb hub specifically developed for 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. *Note 2: Not compatible with Surface Go/ Surface Pro 3/4/5/6/7/8) Triple Display Surface pro 9 docking station: Triple display ( Ultra HD 4K HDMI + USB-C Thunderbolt 4 ) + Surface Pro 9/Pro10/Pro11/ProX modes Boost your efficiency 3 times. 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. Support Extend Or Mirror Mode, HDMI Resolution up to 4K@30Hz, USB-C Thunerbolt 4 resolution up to 8K@30Hz; An ideal Gadget for Video Editor, Photography, Programmer 4K HDMI adapter for Surface Pro