Ultra-compact & portable Thunderbolt 3 PCIe expansion chassis - transform your notebook into a compact media workstation! the RocketStor 6661A allows you to quickly add any PCIe X4, X8 or X16 card to your Thunderbolt 3 capable computing platform; such as media capture, Ethernet, fiber channel, or external storage/RAID controller cards. Like it's processor, the lightweight, small-footprint design is ideal for compact workstations and mobile computing platforms such as iMacs, MacBook's pros and Razor notebooks. At just 7 inches tall, and less than 3 inches wide, the RocketStor 6661A is small enough to pack into a laptop bag, yet is capable of supporting full-sized PCIe 3.0 add-in cards. Efficient chassis design keeps temperatures in CHECK during heavy workloads: PCIe devices, such as networking, video and hardware RAID cards can generate a great deal of waste heat during heavy I/O; an efficient, reliable, cooling system is an essential component of any PCIe expansion solution. The RocketStor 6661A was designed to accommodate performance intensive applications. The ventilated, all-aluminum chassis and dual cooling fans keep temperatures in CHECK during high-stress workloads. Simple plug and play installation: the RocketStor 6661A can be easily added to any Thunderbolt 3 capable Mac & PC platform via a single cable connection. Quick release thumbscrews and a Slidable chassis Cover make adding or removing PCIe cards a snap!.