Remember Elgato's Thunderbolt dock? Because it has just been updated, now with two doors Thunderbolt 2 and a great new feature: HDMI output supporting 4K resolution (in addition to three USB 3.0 and a Gigabit Ethernet). It also features an amplified audio output and an optional power source for recharging USB devices. The product costs US $ 230 in the United States. (Elgato)
On the front side there is still another USB 3.0 and a microphone and headphones input.