The Echo Express III-R Thunderbolt 2 Expansion Chassis for PCIe Cards from Sonnet mounts in a rack space 2U tall in height. It is 16" (40.6cm) deep, making it perfect for use in a wide range of mobile racks, carts, rack cases and server rooms. The expansion chassis even saves space for other equipment.

Echo Express III enables you to connect 3 compatible full-size professional video capture, audio interface and other special-purpose cards to your iMac, Mac mini, new Mac Pro, MacBook Air or MacBook Pro with a Thunderbolt 2 port. Featuring 20 Gbps Thunderbolt 2 technology, this Echo chassis ensures optimum performance from the most demanding PCIe cards with every compatible computer. It integrates a universal 300W power supply and includes a 75W auxiliary power connector for cards that require supplementary power. In addition, the Echo Express III is environment-friendly; it automatically powers off when the connected computer powers off or sleeps. The use of larger, slower-spinning fans in the Echo Express III allows for maximum noise reduction. Two Thunderbolt 2 ports support daisy chaining of up to six devices to a single port on your computer.