Belkin Thunderbolt 2 Express HD Dock with 1-Meter Thunderbolt Data Transfer Cable, Mac and PC Compatible (F4U085tt) Transfers files at 20 Gbps with Thunderbolt 2 technology 4x faster than USB 3.0 and 25x faster than FireWire 800 Supports dual displays & 4K cinema resolution Connect 8 separate devices through a single Thunderbolt cable, and daisy chain up to 4 more Thunderbolt devices (5 total) Keeps your workspace organized and your setup streamlined Ultra sleek, lightweight design with brushed aluminum body The Belkin Thunderbolt Dock includes three USB 3 ports, two Thunderbolt 2 ports, HDMI, Ethernet, audio out port, and additional audio out port with mic support Note about dual displays: At least one display has to be Thunderbolt or Thunderbolt 2 technology-ready. For displays that are not Thunderbolt technology-ready, the Thunderbolt port is backwards compatible with Mini DisplayPort. The dock supports either HDMI or Mini DisplayPort, but not both. The dock supports only one display at 4K cinema resolution.