Introducing the Sonnet Echo Express SE - a high-performance Thunderbolt 1 Expansion System that lets you add PCIe cards to your computer. This powerful device boasts a sleek design and works seamlessly with any Thunderbolt-enabled Mac or PC. With the ability to add a variety of PCIe cards, you can easily enhance your computer's capabilities. Whether you need to add high-speed storage, a professional video capture card, or a high-performance audio interface, the Sonnet Echo Express SE has got you covered. So, upgrade your system today and take your computing experience to the next level with the Sonnet Echo Express SE!