Lenovo ThinkPad Onelink Dock USA ( 40A40090US , Retail Packaged ) for Models P40 Yoga, X1 Tablet (1st Gen), X1 Tablet (2nd Gen), Yoga 14, Yoga 260, Yoga 460, X1 Carbon (4th Gen), X1 Yoga (1st Gen) Lenovo 40a40090us ThinkPad Onelink Dock - USA 90W AC Adapter Included Compatible with the following Lenovo Systems: ThinkPad 13 Windows, P40 Yoga, X1 Tablet, Yoga 14 ( Machine Type 20FY Only), Yoga 260, Yoga 460, X1 Carbon (4th Gen), X1 Yoga (1st Gen) Only This item is Not Compatible with the X1 Carbon 2nd generation, 3rd generation or 5th generation x1 carbon models. A single OneLink cable enables all docking functions while delivering continuous power, allowing you to boost your productivity in no time, Up to 4k video output allows you to enjoy a vivid video experience with your brand new ThinkPad Ultrabook, Power button on dock mirrors system power button, Gigabit Ethernet (10/100/1000) with Boot over LAN support on all ThinkPad OneLink systems You will need to down load the latest Lenovo firmware update for this item to function correctly. Total maximum 3 monitors can be output including system LCD.