The Sonnet Echo Express SE I (Thunderbolt 3 Edition) is a compact desktop Thunderbolt to PCIe card expansion system that allows you to connect a single PCIe card to any computer with Thunderbolt 3 or Thunderbolt 4 ports. This system features a PCIe 3.0 x8 slot and space for a daughter card, making it compatible with nearly every Thunderbolt 3-compatible PCIe 3.0, PCIe 2.0, and PCIe 1.1 card. With a rugged aluminum housing and an energy-saving mode, it provides 15W of power to connected peripherals. The system includes a 0.7-meter Thunderbolt 3 cable that supports full 2750 MB/s bandwidth and up to 100W power delivery. It is compatible with Mac, Windows, and Linux and comes with a 2-year product warranty and free lifetime technical support.