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.

Accomodating 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.

Two PCIe 2.0 Slots Plus Space for a Daughter Card - The Echo Express SE II has two PCIe 2.0 x8 slots, which support two half-length+ (up to 7.75" long), full-height, single-width PCIe cards. You can also opt for a one single-width card plus one double-width card. Some specialty cards, such as RME's HDSPe MADI FX card, Blackmagic Design's DeckLink 4K Extreme, and the Lynx AES16e 50, include a daughter card that mates with and provides additional external connections to the main card. The daughter card occupies the adjacent PCIe card space without filling a slot. The Echo Express SE II accommodates a daughter card's installation without wasting a slot.

Thunderbolt 2 Technology - The Echo Express SE II features the 20Gbps Thunderbolt 2 interface, ensuring that even the most demanding cards will perform at their peak with the new Mac Pro and other Thunderbolt 2 technology-equipped computers to follow. It is also backward compatible with 10Gbps Thunderbolt-equipped computers.

Cool Design - Outside and In The Echo Express SE II's aluminum outer shell securely protects the cards inside and helps transfer heat away from them. The large and quiet, temperature-controlled fan automatically speeds up and slows down smoothly as needed, so there's no need to guess which switch position to select. The enclosure is ventilated front, back, and bottom to facilitate airflow over the cards.

Strong Link in the Chain - The Echo Express SE II supports daisy chaining of additional Thunderbolt-compatible peripherals, such as an additional Echo Express SE II, the Apple Thunderbolt Display, video capture devices, and data storage devices. For connected devices requiring extra power, 10 watts is provided through the daisy chain port to peripherals

Efficient Cooling - With a temperature-controlled fan, the Echo Express SE II automatically operates slowly and quietly with cooler cards and provides better cooling for hot cards.

Energy Efficient - The Echo Express SE II has an energy saver mode that powers on and off automatically with the computer

Sufficient Power - The 80-watt power supply can handle any combination of PCIe cards you place in the Echo Express SE II Durable Design The aluminum housing of the Echo Express SE II provides portable protection for any environment