The Microsoft Surface Docking Station 1661 is designed for Microsoft Surface Pro X, 7, 6, 5, 4, 3 and more. It features passive cooling, a sleek black color and a range of ports including audio out, mini displayport, ethernet, USB 3.0, and USB 2.0. With compatibility for various Microsoft Surface models, such as Pro 3 and 4, this docking station offers convenience and versatility for expanding your laptop's capabilities. Additionally, it includes features like AC power, anti-slip design, and built-in USB port for added functionality.