Lenovo Thinkpad Ultra Dock With 170w AC Adapter ( 40A20170US ) In the Original Lenovo Factory Sealed USA Retail Packaging Lenovo Retail Packaged and Lenovo Factory Sealed 40A20170US Which Includes The 170W Ac Adapter. Includes Lenovo 170w 2 prong USA 110V AC Adapter. Compatible with L440 , L450, L460, L470, L540 , L560, L570, P50s , P51s , T440, T440p, T440s , T450, T450s, T460, T460p, T460s, T470 ,T470p ,T470s, T540p ,T550, T560 ,T570 , W540, W541, W550s ,X240 ,X250 ,X260, X270 ThinkPad Ultra dock is capable to support up to 4k2k(3840x2160) at 60Hz via either 1 of 2 DP ports, or support dual 4k2k at 30Hz via 2 DP ports. Actual video output on the dock is based on system video performance since the video signal is passing through from system to the Ultra dock. Some of the video ports do have exclusive use and are also dependent on the docked ThinkPad configuration Please update to the latest system BIOS on Lenovo sight before using the L440 , L540 and All T Series Models with a ThinkPad Ultra Dock 170W Supports models with integrated graphics only. Does not support models with discrete graphics.