Add two PCI-Express 3.0 x16 slots capable cards and increase the potential of a Thunderbolt 3 or 4 capable laptop, desktop, or all-in-one system with the Thunderbolt 3 PCIe Expansion Chassis. Add video capture cards, high-speed fiber or Ethernet connectivity, NVMe drives, FireWire, sound cards, and more. Connect the chassis to a computer with the included 3.3ft (1m)Thunderbolt-certified cable. The chassis supports a vast range of PCI-Express cards on the dual PCIe 3.0 slots (each slot supports up to 2700MBps/21.6Gbps), including single-width to a maximum length of 8in (20.3cm). MacOS and Windows are supported. Active cooling with the built-in fan prevents overheating during heavy usage, while the toolless design and aluminum construction for painless card installation and durability. Experience Ultra High Definition display support through the DP 1.4 and Thunderbolt 3 ports, delivering video outputs up to 8K/5K 60Hz or dual 4K 60Hz. Your connected devices receive optimal power with up to 25W per slot, and two internal 12V (15W) SATA power ports are available for up to 40W per card. The included 12V 10A (120W) international power adapter ensures a reliable power supply. This product is backed for two years, including free lifetime 24/5 multi-lingual technical assistance.