Like A Thunderbolt

Sonnet has added the Echo Express II to its Echo family of Thunderbolt expansion chassis for PCIe cards. The Echo Express II was designed for users needing a compact solution to connect two PCIe cards to their computers, and supports the majority of Thunderbolt-compatible PCIe cards. The Echo Express II adds a second slot to support two half-length (up to 7.25 inches long), full-height, single-width PCIe 2.0×16 cards. It has dual Thunderbolt ports to support daisy-chaining of devices.
www.sonnettech.com