Sonnet Technologies Echo Express III-R - Manual (Page 5)

Chapter 1 – Introduction
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Congratulations on your purchase! The Echo Express III-R is a Thunderbolt-to-
PCI Express card expansion chassis; through its PCIe slots, you may connect
three expansion cards to any Mac
® with a Thunderbolt port to expand its
capabilities in ways never before possible!
While the Echo Express III-R chassis requires no drivers, the expansion
cards you install do; Thunderbolt-compatible drivers to enable them to work
properly through the Thunderbolt interface are required. More information on
which cards are compatible with Echo Express III-R is available at:
http://sonnettech.com/support/charts/thunderbolt/index.html