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The Echo Express SE II Thunderbolt 2 Expansion Chassis for PCIe Cards from Sonnet enables you to connect two high-performance, professional pro video capture and processing, DSP accelerator, FireWire, RAID controller, Gigabit Ethernet, eSATA, or any other PCIe card to any Mac with a Thunderbolt 2 port. Accommodating cards of up to 7.75 inches in length, this compact expansion chassis supports a large variety of Thunderbolt-compatible PCIe cards on the market, even double-width cards, which is a PCIe card combined with a daughter card.
With a compact form factor, the Echo Express SE II takes up little space wherever you work, whether it's the studio, on location, or at your desk. Like most Thunderbolt 2 ports, the Echo Express SE II supports daisy chaining of up to six devices to a single port on your Mac.