Sonnet Echo Express III - system bus extender - 2 x Mini DP

Sonnet's Echo Express III enables you to connect three compatible full-size professional video capture, audio interface, and other special-purpose cards to your iMac, Mac mini, Mac Pro, MacBook Air, or MacBook Pro with a thunderbolt port. Featuring 20 Gbps Thunderbolt 2 technology, these Echo chassis squeeze every bit of performance out of the most demanding PCIe cards and ensure optimum performance with every compatible computer. Even with all that power, the III is enviro-friendly; it automatically powers on/off when the connected computer powers on/off or sleeps. The use of larger, slower-spinning fans in the Echo Express III makes it the quietest Echo chassis yet. Two Thunderbolt ports support daisy chaining of up to six devices to a single port on your computer.