Microsoft Surface Dock Triple Displays, 12 in 1 Surface Docking Station with Dual 4K HDMI+VGA Triple Display (2 HDMI 4K+VGA) Microsoft Surface Dock for Surface Pro 9/8/X/7/6/5/4/3, Surface Book 3/2, Surface Book, Surface Laptop go/5/4/3/2/1 12-in-1 Microsoft Surface Dock Hub provides convenient connectivity for an expanded workspace; connect a Windows laptop with up to 3 screen and reach three displays (HDMI+HDMI+VGA). Multi-Monitor Support and make you enjoy stunning visuals and crystal-clear display quality that will elevate your work and entertainment experience. MS Surface Pro Triple Display Docking Station-Support Mirror Mode &Extend Mode Triple Display Surface Docking Station Support Mirror Mode &Extend ModeSurface Triple display modes boost your efficiency 3 times.When the three display interfaces are output at the same time, the 2 HDMI ports all support resolutions up to 3840 x 2160@30Hz.*Note: Connect one surface up to 3 screens and achieve three displays (HDMI/HDMI/VGA + surface).When you need to connect 3 monitors, you need to turn off the Surface screen. multiport Surface Pro Dock 2 * 4K HDMI port (3840 x 2160@30Hz) 1 * 1080P VGA port (1920 x 1080@60Hz） 1* RJ45 Ethernet LAN Port 100 Mbit/s 2 * USB C Ports For data transfer, up to 5Gbps 2*USB A Ports For data transfer, up to 5Gbps 1 *3.5mm Audio/Mic 2-in-1 Jack 1 * SD Card Slot Up to 480Mbps 1 * TF Card Slot Up to 480Mbps 1*DC Power Port 72W Power Supply 14V-5A power supply Comes with a 14V 5A power adapter that allows you to charge your SURFACE at high speed while keeping all the functionality of the hub's other ports.Dimensions:Surface Dock: 4.96 x 2.36 x 0.87 inchesPower supply: inch (power cable: 4FT)AC Power Cord: 4 FT Surface Dock Specific Compatible List Microsoft Surface Laptop 5/4/3/2/1, Microsoft Surface Pro 9/8/X/7/6/5/4/2017, Microsoft Surface Laptop Go 3/2/1, Microsoft Surface Book 3/2/1, Microsoft Surface Laptop Studio 2/1 3.5mm Aux Jack Audio Port Surface Pro Dock supports simultaneous audio and video transmission, Surface Dock allow you to connect speaker and enjoy good quality sound.