Microsoft Surface Dock for Surface Pro 3, Surface Pro 4, and Surface Book with 4 USB Ports (Black)Instantly transform your Microsoft Surface into a desktop PC with the Microsoft Surface Dock. Simply plug in the Microsoft Surface Connect cable to charge your device and access external monitors, keyboards, mouse, and more. Find the perfect viewing angle or position your device to take advantage of the robust pen capabilities. Compatibility The Microsoft Surface Dock is compatible with the Surface Pro 3, 4, and Surface Book. Ports and Connectivity