Sonnet Thunderbolt Dual DisplayPort Adapter

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Connect Two 4K Displays from a Single Thunderbolt Port on a Mac or PC
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Mac & Win
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Connect Two 4K Displays from a Single

Thunderbolt Port on a Mac or PC


Sonnet’s Thunderbolt™ Dual DisplayPort Adapter is certified for use with both Mac® and Windows® Thunderbolt equipped computers, and enables you to connect two displays to a single Thunderbolt port on your computer. With the adapter connected, you can connect two 4K @ 60Hz DisplayPort monitors, or two 1440p @ 144Hz monitors.

Work Efficiently


Display with Apps Windows IconWhether you need to view your work across two displays, or you need to view it with the highest resolution possible, this Sonnet plug-and-play adapter enables you to work more efficiently. With two displays attached, you can fill one with full-screen workspace, and use the other for tools, other applications, and more.


Convenient – No External Power

Adapter Required


To use it, simply plug in the Sonnet Thunderbolt Dual DisplayPort Adapter into one of your computer’s Thunderbolt ports, and connect DisplayPort cables (sold separately) between the adapter and your monitors. Your computer powers the Sonnet adapter, so there’s no need to connect an additional power adapter.




Thunderbolt Certified for Mac® and Windows®, the Sonnet Thunderbolt Dual DisplayPort Adapter can be used with the latest and best computers available. If you need to connect a monitor without a DisplayPort (DP) input, the Sonnet dual DisplayPort adapter is compatible with active DP-to-HDMI, DP-to-DVI, and DP-to-VGA adapters. And, unlike USB adapters, the Sonnet adapter won’t drain system resources that might impact your computer’s performance.


Key Features


Connects Two DisplayPort Displays to a Single Thunderbolt Port—Enables connection of two 4K DisplayPort (DP) displays @ 60Hz, or two 1440p @ 144Hz display to a single Thunderbolt port on your computer


Compatible with Both Mac and Windows—Thunderbolt certified for use with macOS and Windows computers with Thunderbolt ports


Enables You to Work More Efficiently—Fill one display with full-screen workspace; use the other for tools, other applications, etc.


No Power Adapter Required—Sonnet adapter draws power from Thunderbolt port


Backward-compatible with 1080p HD Displays—

Great for use for different home and office workspace applications


Compatible with Active HDMI, DVI and VGA

Adapters—Enables connection of non-DisplayPort displays


Built In Audio Support—No need to connect additional cables, audio signal passed over DisplayPort connection to display that has audio output capabilities


Compact and Rugged Design—Portable aluminum enclosure with two DisplayPort connectors


Adapts to Your Needs


Although the Sonnet adapter supports two monitors at resolutions up to 4096 x 2160 (4K), you can also use it to connect monitors with lower resolution, like 1440p or 1080p monitors at higher refresh rates. This makes it great for use for different home and office workspace applications. And, with built-in audio support, there’s no need for you to connect an additional cable to hear sound from the monitors.

Part No. 
TB3-DDP4KGSonnet Thunderbolt Dual DisplayPort Adapter
Form FactorDisplay adapter
Bus Interface40Gbps Thunderbolt
External ConnectorsTwo DisplayPort ports
StandardDisplayPort 1.2 and HDCP 2.2(1)
Supported Resolutions(2)
  • 4K @ 60Hz
  • 1440p @ 144Hz
  • 1080p @ 240Hz
Dimensions (WxDxH)2.3 x 3.9 x 0.6 in. (59 x 99 x 16 mm)
Dimensions, Cable (Length)11.8 in. (300 mm)
RoHS CompliantYes
Package Contents
  • Thunderbolt Dual DisplayPort Adapter
  • Documentation


Specifications subject to change without notice.





Mac Compatibility

Intel 15" and 16" MacBook Pro and iMac Pro with four Thunderbolt 3 ports support four 4K monitors with two Sonnet adapters

All other Intel Macs with Thunderbolt 3 ports support two 4K monitors with one Sonnet adapter

M1 Pro, M1 Max, and M1 Ultra Macs support two 4K monitors with one Sonnet adapter

M1 and M2 Macs are not compatible. Use Sonnet's DisplayLink Dual DisplayPort Adapter for M1 Macs

macOS 10.12.6+

macOS Ventura compatible

Windows Compatibility

Windows PC with Thunderbolt 4 or Thunderbolt 3 ports

Windows 10 or 11

Monitor Compatibility

EDID Version 1.4(3)

Technical Notes

  1. macOS supports HDCP only with iTunes.
  2. Other common resolutions are also supported.
  3. EDID stands for Extended Display Identification Data. This is how the monitor identifies its resolution modes to the adapter. EDID Version 1.4 was finalized in 2006. If your HDMI monitor is more than 10 years old, it will likely not be supported.




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