Elgato Thunderbolt Dock, Thunderbolt Cable Included (10024010) connect everything to your MacBook or Ultrabook at once two Thunderbolt ports: extended Thunderbolt versatility built-in HDMI port: directly connect a display of your choice built-in Gigabit Ethernet: enjoy increased network performance three USB 3.0 ports: simultaneously connect all of your devices separate microphone input and audio output