Key feature*
• Connects Two 4K Displays to a Single Thunderbolt Port – Enables connection of two 4K @ 60Hz (Mac) or up to 4K @ 120Hz (Windows) HDMI displays to a single Thunderbolt port on your computer.
• Expands Your Onscreen Work and Play Area – Open multiple applications on different displays, view your work on larger screens, browse the web, and watch videos.
• 8K @ 60Hz and Dual 4K @ 120Hz Display Support – Higher resolution and faster refresh rate supported with some Windows computers.
• Supports Other Resolutions – Also supports 1080P and other lower resolution displays @ 60Hz.
• Automatic Setup. Bus Powered – Sonnet adapter uses operating system drivers and draws its power from the Thunderbolt port.
• Supports HDMI Audio – Passes audio through the cables connecting your displays.
• No Impact on Your Computer’s Performance – Unlike many USB video adapters, this Sonnet Thunderbolt adapter won't drain system resources.
• Free lifetime customer technical support.

—Connect Two 4K HDMI Displays Using Only One Thunderbolt Port on Your Computer—
Do your ideas and workflow need room to grow beyond a single screen? Sonnet Thunderbolt™ Dual HDMI® 2.1 Adapter makes it possible for you to work more efficiently with your laptop, compact desktop or all-in-one computer, enabling you to connect two 4K (3840 x 2160) @ 60Hz displays (Mac) or up to two 4K (3840 x 2160) @ 120Hz displays (Windows) to a single Thunderbolt port on your computer.
—Supports Up to 8K Resolution with Windows Computers—
This Sonnet adapter can also support one 8K (7680 x 4320) @ 60Hz display plus one 4K @ 60Hz display at the same time — ideal for when you need to connect your computer to the largest displays possible! Note that 8K monitor support under Windows depends on the number of monitors, maximum resolution, and refresh rates your computer supports.
—Productivity Partner – Expands Your Workspace. Enhances Your Workflow.—
Work more efficiently and expand your application desktop space across multiple screens. Whether you need to edit video or code like a pro, open multiple applications on their own screens, crunch spreadsheets in detail, or mirror your notebook’s display on a larger monitor, Sonnet Thunderbolt Dual HDMI 2.1 Adapter makes it possible. Connecting the adapter is plug-and-play easy – your computer powers the Sonnet adapter, so there’s no need to connect an additional power supply, and with native macOS® and Windows® support there’s no need to install separate driver software.
—Go Bigger – Enjoy the Web and Videos at a Distance—
Even when you’re not working hard, your laptop’s screen can constrain your view. Go much bigger — Sonnet Thunderbolt Dual HDMI 2.1 Adapter enables you to connect your computer to your big screen TV or large monitor to browse the web and watch videos on YouTube and other content at a distance.

* See Sonnet website for details.