Elgato Thunderbolt™ Dock has the following ports:

2x Thunderbolt™ (10 Gb/s, bi-directional Input/Output)
1x HDMI 1.4 Output (up to 2560x1600 pixels resolution, HDCP compliant)
1x RJ45 10/100/1000BASE-T Gigabit Ethernet
3x USB 3.0 (5 Gb/s, support for bus-powered devices, UASP & USB 2.0 compatible)
1x 3.5mm Audio Output (analog stereo, via built-in DAC)
1x 3.5mm Microphone Input (mono, via built-in DAC)
1x Power Input (DC 12V 5A)

These ports are located in the following places:

On The Back:
 
Two SuperSpeed USB 3.0
Two Thunderbolt
One HDMI
One Gigabit Ethernet
One Power (12V 5A)


On The Front:
One Stereo Headphone output
One Microphone input
One SuperSpeed USB 3.0