The ThinkPad USB 3.0 Dock provides a quick and easy connection to all the workspace peripherals you use every day. Simply plug in a single USB 3.0 cable into your Lenovo PC for instant access to up to two external monitors, Gigabit Ethernet, headphones/speakers, USB printers and scanners, keyboard, mouse, and up to 5 Gbit/s access to external storage (over 10 times faster than USB 2.0). Dock requires included AC power to operate.