Key Features
• Connects a PCIe Expansion Card to Computers Without Slots—Use high-performance PCIe cards with any Mac® with a Thunderbolt™ 2 or Thunderbolt port
• One PCIe 2.0 x8 Slot—Supports low-profile card
• 20Gbps Thunderbolt 3 Interface—Full Thunderbolt 2 performance; supports 10Gbps Thunderbolt peripheral devices
• Full Performance in a Small and Light Package—Smallest Thunderbolt 2 to PCIe card expansion system available, supports the most popular low-profile, Thunderbolt-compatible PCIe cards at full performance
• Two Thunderbolt 2 Ports—One port reserved for connection to the computer; second Thunderbolt 2 port supports daisy chaining of up to five additional Thunderbolt peripheral devices
• Remarkably Quiet—Temperature-controlled, variable-speed fan automatically and quietly cools the card
• Energy Saver Mode—Powers on/off automatically with the computer
• Rugged Aluminum Housing—Provides robust and secure protection for use in any environment
• Power for Peripherals—Provides up to 10 watts of power to connected peripheral
• Thunderbolt Cable & ThunderLok Included—Includes 1-meter Thunderbolt 3 (40Gbps) cable and ThunderLok Thunderbolt connector retainer clip to secure cable from accidental disconnections
• Upgradeable to Thunderbolt 3
• Free Lifetime Technical Support

— Connect a Low-profile PCIe Card to Computers with Thunderbolt 2 Ports —
Sonnet's Echo Express SEL Thunderbolt™ 2 to PCIe card expansion chassis enables you to connect one high-performance PCIe card — originally designed for use in desktop computers — with any Mac® computer with a Thunderbolt port. Featuring 20Gbps Thunderbolt 2 technology, the SEL delivers maximum performance when connected to a computer with Thunderbolt 2, but is fully compatible with computers with 10Gbps Thunderbolt technology. Very compact and quiet operating, the SEL was designed to support one low-profile PCIe card, including many of the most popular 16Gb and 8Gb Fibre Channel, 10 Gigabit Ethernet, SAS and SATA host bus adapters and RAID controller cards.