Two HDMI Displays from a Single Thunderbolt Port

Do your ideas and workflow need room to grow beyond a single screen? Sonnet Thunderbolt Dual 4K 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 120Hz (or 8K 60Hz + 4K 60Hz) monitors as supported by your Windows computer, or two 4K 60Hz to Apple® M series Pro, Max, or Ultra Macs.

Productivity Partner

Expanded Workspace. Enhanced 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, or crunch spreadsheets in detail, Thunderbolt Dual 4K 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 Window 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 — Thunderbolt Dual 4K HDMI 2.1 Adapter enables you to connect your computer to your big screen TV or large monitor to share videos and other content.

Expand Your View

Connect Four HDMI Displays to Mac Studio or MacBook Pro M2/M3 Max
Connect four HDMI displays to your Mac Studio® with two Sonnet Thunderbolt Dual 4K HDMI 2.1 Adapters. Connect four HDMI displays to your MacBook Pro® M2 Max or M3 Max: the first two to a Thunderbolt Dual 4K HDMI 2.1 Adapter, the third to a USB-C to HDMI adapter (like Sonnet USB-C DisplayLink Dual 4K 60Hz HDMI Adapter), and the fourth to the built-in HDMI port of your MacBook Pro.

Not Just for 4K Displays

Supports Full HD (1080p) Displays and Audio Out
While Thunderbolt Dual 4K HDMI 2.1 Adapter supports two 4K @ 60Hz monitors, you can also use it to connect monitors with lower resolutions, like full HD 1080p (1920x1080) @ 60Hz — this makes it great for use for different home and work applications. Because audio support is built into the Sonnet adapter, you don’t have to plug in a separate cable to hear sound from connected displays.

Optimal HDMI Video Performance Over Thunderbolt or USB4

Compatible with M series Pro/Max/Ultra and Intel Macs, and Intel Mac and Windows Computers with Thunderbolt or USB4
Thunderbolt Dual 4K HDMI 2.1 Adapter is ideal for most computers with Thunderbolt or USB4 ports. Thunderbolt’s 40Gbps interface lets you run Ultra HD 4K resolution at 120Hz on both displays at full performance. Need dual 4K monitor support with your basic M series Mac; or Intel or AMD PC without Thunderbolt or USB4? Check out USB 3 DisplayLink Dual 4K 60Hz HDMI Adapter and USB-C DisplayLink Dual 4K 60Hz HDMI Adapter (with PD Passthrough).

Part Number	TB-DHDMI-21
Hardware
Form Factor	Display adapter
Bus Interface	40Gbps Thunderbolt
External Connectors	Two HDMI Thunderbolt captive cable
Standards	HDMI 2.1 HDCP 2.2
Maximum Resolutions	macOS: Two 4K (3840 x 2160 @ 60Hz) Windows: Two 4K (3840 x 2160 @ 120Hz); or one 8K (7680 x 4320 @ 60Hz)
Dimensions (WxDxH)	thunderbolt-to-dual-4k-hdmi-adapter
RJ45 (Ethernet) Port	Network Support — Supports 2500 Mb/s, 1000 Mb/s, and 100 Mb/s network speeds and Auto-MDI/MDI-X Standard— Compliant with 802.3bz-2016 and 10/100/1000 IEEE 802.2 Specifications Network — 2.5 Gigabit Ethernet (2.5GBASE-T, 1000BASE-T, 100BASE-TX) Packets — Maximum packet size: 9000 bytes (Jumbo packets) Chip— Realtek RTL8156
Compliance	RoHS 3 (Directive 2015/863) IEC62368-1 and IEC62368-2 Safety
Package Contents	Thunderbolt Dual 4K HDMI 2.1 Adapter (with captive 7.9-inch [20cm] Thunderbolt cable) Documentation