One Thunderbolt 3 Port, Dual 4K Monitors Turn your Thunderbolt 3 Laptop into a super graphical workstation. Maximizing the high bandwidth of 40Gbps from Thunderbolt 3 technology, this adapter is expanding your laptop into a high-end, 3 monitor graphical workstation. Get the most from your MacBook Pro and Windows laptop and fully harness the video capability of Thunderbolt 3 with stunning dual 4K video or a single 5K @60Hz. And since Thunderbolt technology is based on PCIE architecture with direct data access to the system bus, minimum overhead is need from your laptop's CPU utilization. Thus, preserving your CPU utilization for more computing intensive tasks. Video Quality the Pros Come to Expect Weather you have a MacBook Pro or the iMac, you can instantly transform your Thunderbolt 3 port into two iinvidual Display port video outputs with ultra high quality video at 4K @60Hz or one single 5K video at 60Hz without the need to purchase expensive graphical workstations. Graphic designers and video editors will appreciate the vivid 4K or 5K graphics that this little adapter has to offer. Portable Yet Powerful The IOGEAR Thunderbolt 3 Dual DisplayPort Adapter's body is made of a high quality alloy and features a portable compact size. Wheather you are in the office or on-the-go, the adapter provides superior video images rivaling desktop graphical workstations. With the capability to cycle your screen up to 60 times a second, you know you are getting the highest quality video available. The hardware is optimized with its high-end circuitry, this adapter is bus-powered, eliminating the need for an external power supply.