The Thunderbolt docking station is used to add HD video outputs, Gigabit Ethernet, a USB 3.0 hub. The Thunderbolt dock employs a dedicated controller for onboard I/O handling, which frees up your system resources for other tasks. Thunderbolt technology simultaneously supports a high-resolution display and high-performance data devices through a single interface. Thunderbolt also allows to daisy-chain up to 6 additional devices for maximum connectivity.