Lenovo P50 and P70 Docking station 40a50230us;40A50230US INCLUDES 230W AC ADAPTER - USED IN P50 AND P70 MODELS ONLY - NOT USED IN P50S OR P70S;Features and Benefits, 6x USB 3.0, one supports always-on USB charging , 10/1000 Gigabit Ethernet, supports enterprise manageability, 2x DisplayPort 1.2 , 1x DVI-D , 1x HDMI 1.4 , 1x VGA , 1x Stereo/Mic Combo Audio Port ,Driver-free, perfect video quality, Security Lock conveniently secures both your notebook and dock to your desk with a single key , Physical rear alignment for a perfect dock every time;Comes with ThinkPad AC adapter (230W);Workstation 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.