The US7220 is a Thunderbolt 2 Sharing Switch. It’s compliant with Thunderbolt 2.0 by doubling the bandwidth than Thunderbolt 1.0 to run at 20 Gbps, Thunderbolt technology enables simultaneous 4K video file transfer and display for eye-popping video and data capability. The US7220 Sharing Switch lets user use a single connection to create high-speed, reliable transfers between two Thunderbolt PCs/Laptops and provide daisy chaining capability with multiple Thunderbolt devices. With the US7220 Sharing Switch, all drives, input and output devices connect to the ports on the back. In short, user can share their existing thunderbolt devices with one extra Thunderbolt host by connecting with only one cable.