The ThinkPad USB 3.0 Ultra Dock is a universal USB docking solution that not only delivers a premium display experience (up to 4K2K resolution via DP port), but also provides quick and easy connection to all of the workspace peripherals you use every day. Simply plug a single USB 3.0 cable into your Lenovo PC for instant access to up to two external monitors, USB ports, Gigabit Ethernet, headphones/speakers, USB printers, scanners, keyboard, mouse and more for daily use. The dock can also charge your mobile devices via two always-on USB ports. Dock requires AC power to operate.