Thunderbolt Dual 4K HDMI 2.1 Adapter
Universal Thunderbolt 4 Dock with Three Thunderbolt 4 Ports, M.2 SSD Slot, HDMI 2.1 Port, 2.5Gb Ethernet Port, Eight 10Gbps USB Ports, and More!
Mac® | Windows® | Chromebook | iPad Pro®
Compatible with Apple® M series Macs; Thunderbolt™ 3 Intel® Macs; Thunderbolt 3 and 4 Windows computers; Thunderbolt 4/USB4 Chromebook; and M series iPad Pro
Product Highlights
- One Cable Peripheral Connection — Instant access – plug in all your peripherals into the Echo dock and connect your computer to the dock with the included Thunderbolt 4 cable.
- Twenty Interfaces — SuperDock includes three Thunderbolt 4, four USB 3.2 Gen 2 Type A, and four USB 3.2 Gen 2 Type-C charging ports; HDMI port; RJ45 2.5 Gigabit Ethernet; 3.5mm combo audio; 3.5mm microphone; line-level R+L RCA audio out; SD 4.0 card slot; and M.2 SSD slot.
- Two Thunderbolt 4 Ports for Peripherals — Connect two Thunderbolt peripherals directly (with support for daisy chaining additional peripherals). Also support USB4 and USB 3 devices, plus displays.
- M.2 NVMe SSD Slot — Add up to 8TB of storage inside (SSD sold separately); data transfer speeds up to 800MB/s for fast media storage and Time Machine backups.
- 10Gbps USB Type-C Charging Ports — Four USB 3.2 Gen 2 USB-C ports support the USB Type-C Charging spec and provide up to 7.5W of power each, supporting super-fast USB NVMe SSDs at up to full speed, and device charging too.
- Powerful 10Gbps USB Type A Ports — Four USB 3.2 Gen 2 USB-A ports provide up to 7.5W of power each, supporting super-fast USB NVMe SSDs at up to full speed.
- Built-in HDMI Port — Connect an 8K @60Hz HDMI display directly, no adapter required.
- Support for 4K, 5K, 6K and 8K @60Hz Displays — Depending on your computer, supports up to two 6K displays or a single 8K display
- Connect Another Display via Thunderbolt — Connect a Thunderbolt or USB-C display directly. Supports an HDMI or DisplayPort display with a Thunderbolt-compatible adapter (sold separately).
- Charge Your Laptop — Provides up to 100W through the included Thunderbolt 4 cable to power and charge your laptop.
- More Audio I/O — 3.5mm stereo headset jack on the front panel. Separate left/right channel RCA line out jacks that deliver a clean signal to powered speakers or an amplifier, plus a 3.5mm microphone jack populate the back panel.
- Fast SD Card Slot — Compatible with SD™, SDHC™, and SDXC™ memory cards; supports 320 MB/s read speeds with UHS-II SDXC cards. Also supports microSD™ cards when used with adapter.
- Overview
- Tech Specs

Thunderbolt 4
Expand Your Connectivity to the MaxMore connections than you expect from a Thunderbolt™ dock – NVMe SSD storage capability, an HDMI port, ultra-fast 2.5 Gigabit Ethernet support, and more! With this superdock, a single cable connects your computer to your digital world. The Sonnet Echo™ 20 Thunderbolt 4 SuperDock is your universal docking station for today and tomorrow.

Plug In
Your Peripherals and Power Your Computer with One CableConnect your Thunderbolt devices, monitor(s), USB peripherals, powered speakers, and Ethernet cable to the dock and then link them all to your computer with a single Thunderbolt cable. Got a laptop computer? You can keep its power adapter in your bag because Thunderbolt Dual 4K HDMI 2.1 Adapter will power it with up to 100W of charging power. When it is time to leave, just unplug the Thunderbolt cable, grab your computer, and go.
Up to 100W of Charging Power
Internal SSD
Expansion SlotThe built-in M.2 NVMe SSD slot enables you to add up to 8TB of SSD storage (SSD sold separately) to your system without connecting a storage device to the Echo dock or the computer. SSD installation is an easy task – simply remove the two screws securing a bottom panel cover, insert the SSD, and reinstall and secure the bottom cover. Transfer and access data at up to 800 MB/s, and effortlessly store large files, media libraries, or your Time Machine® backups.


Onboard
HDMI Display SupportThunderbolt Dual 4K HDMI 2.1 Adapter features a built-in HDMI port, enabling you to plug in an HDMI display directly to the dock.
No HDMI Adapter Required
Faster
Ethernet Transfers Across Existing CablingFeaturing 2.5 Gigabit Ethernet, Thunderbolt Dual 4K HDMI 2.1 Adapter supports a 2.5 Gb/s link speed over common Cat 5e (or better) cabling when used with a compatible Ethernet switch or NAS with 2.5Gb Ethernet support, saving you the cost of another adapter. You can get great performance gains – 250 percent the speed of Gigabit Ethernet – without rewiring! Need to connect to a switch without 2.5Gb Ethernet support? The Sonnet dock also supports 1Gb/s and 100Mb/s link speeds.

Dual
Downstream Thunderbolt Ports – Simple Comprehensive Connectivity for Work and PlayThunderbolt Dual 4K HDMI 2.1 Adapter features three Thunderbolt 4 ports: one for connection/power to your computer – ideal for Mac and Windows laptop computers with only one or two Thunderbolt ports because you can connect and charge on the same port – plus two for directly connecting Thunderbolt peripheral devices.The Thunderbolt peripheral ports also support USB4 and USB 3 peripherals, and even provide 15W power each to support the most demanding bus-powered Thunderbolt and USB peripherals. If your computer supports it, you can even connect another display.

- Combo Audio Jack
 Plug in your headset or headphones
- Two USB 3.2 Gen 2 Type A Ports
 Connect a fast thumb drive, digital camera
- Two USB 3.2 Gen 2 Type-C Charging Ports
 Connect a fast USB-C SSD; connect and charge your phone
- SD 4.0 Card Slot
 Ingest media from SD cards; or microSD cards (with adapter)
- M.2 SSD Slot (beneath cover)
 Install an M.2 NVMe SSD
- HDMI 2.1 Port
 Connect a 8K 60Hz display without adapter
- Host Thunderbolt Port
 Connect your computer; charges a laptop with up to 100W of power
- Two Thunderbolt 4 Peripheral Ports
 Connect lightning fast Thunderbolt plus USB devices
- 2.5 Gigabit Ethernet Port
 Connect to a high-speed network
- Two USB 3.2 Gen 2 Type A Ports
 Connect a fast thumb drive, USB video camera, printer, digital camera
- Two USB 3.2 Gen 2 Type-C Charging Ports
 Connect a fast USB-C SSD; connect and charge your phone
- Audio Line Out Jacks
 Connect to powered speakers or an amplifier
Powerful
10Gbps USB-A and USB-C PortsTThunderbolt Dual 4K HDMI 2.1 Adapter features four USB 3.2 Gen 2 (10Gbps) Type A ports and four USB 3.2 Gen 2 Type-C ports – two each on the front and back – to support super-fast USB NVMe SSDs at up to full speed. And unlike some other docks, Echo 20 doesn’t skimp on power either – each port provides up to 7.5W to ensure that drives with higher peak power requirements can mount and operate without fail. An added benefit for the USB-C ports is they support the Type-C Charging spec, enabling the dock to charge devices even when the computer is off, sleeping, or disconnected.
Each Port Provides Up to 7.5W
Thunderbolt Certified for Mac, Windows, Chromebook, and iPad Pro
Thunderbolt Dual 4K HDMI 2.1 Adapter is certified for use with Apple M series Macs; Thunderbolt 3 Intel Macs; Thunderbolt 4 or USB4 Windows computers; Thunderbolt 3 Windows computers with an Intel 8th Gen (2018) or newer CPU; Thunderbolt 4/USB4 Chromebook; and M series iPad Pro. See Tech Specs for current computer and OS compatibility information.Single 8K
or Dual 6K 60Hz DisplaysDepending on your computer’s video capability and whether you’ve connected a monitor to the built-in HDMI port, the Echo dock’s Thunderbolt ports can support one (always 4K, 5K or 6K, up to 8K) monitor, or up to two 6K monitors. You can plug in Thunderbolt 3 or 4, or USB-C monitors directly. Or, you may connect other display types (HDMI, DisplayPort, etc.) by using a Thunderbolt-compatible adapter (sold separately).
Charge On
Leave the Charger In Your BackpackConnected to your laptop computer with the included Thunderbolt 4 cable, Thunderbolt Dual 4K HDMI 2.1 Adapter provides up to 100W of power (Power Delivery) from its rear-mounted Computer/Charging port, meaning it can power and charge your computer while connected, even when not in use, allowing you to leave your computer’s power adapter packed away.

Dedicated
RCA Audio OutputsTThunderbolt Dual 4K HDMI 2.1 Adapter features stereo RCA connections. RCA outputs provide consistent line-level audio, connecting your sweet music library to your pair of powered speakers. RCA outputs are also ideal for direct connection to a receiver, power amplifier, or mixer.
Media Reader
Fast UHS-II SD 4.0 Card ReaderThe included SD card slot is compatible with SD™, SDHC™, and SDXC™ memory cards, and supports 320 MB/s read speeds with UHS-II SDXC cards to quickly offload images and video. microSD cards are also supported when used with adapters commonly included with the cards.
| Part Number | TB3-DHDMI-21 | 
| Hardware | |
| Form Factor | Display adapter | 
| Bus Interface | 40Gbps Thunderbolt | 
| External Connectors | 
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| Standards | 
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| USB 3.2 Gen 2 Type A Ports (Rear Panel) | 
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| USB 3.2 Gen 2 Type A Port (Front Panel) | 
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| RJ45 (Ethernet) Port | 
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| SD Card Slot | 
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| Audio Line Out | 
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| Internal Slot | NVMe M.2 slot (connected at PCIe x1) | 
| Power Delivery | Provides laptop charging up to 100W | 
| Kensington Security Slot™ | Supports Standard, MicroSaver®, and MicroSaver 2 Locks | 
| Power Adapter | Universal 150W, 100-240V AC, 50-60 Hz | 
| Operating Temperatures | 0°C to 35°C (32°F to 95°F) | 
| Dimensions (WxDxH) | Dock: 9.6 x 4.2 x 1.3 in. (24.3 x 10.6 x 3.3 cm) Power Adapter: 2.6 x 5.4 x 0.9 in. (6.6 x 13.7 x 2.2 cm) | 
| Weight | Dock and Power Supply: 2.55 lbs (1.16 kg) Complete Package: 3.55 lbs (1.51 kg) | 
| Compliance | RoHS 3 (Directive 2015/863) IEC62368-1 and IEC62368-2 Safety VCCI-B certified FCC Part 15, Subpart B CISPR 32 / EN 55032 Power Supply (PSE certified; UL certified) | 
| Package Contents | Thunderbolt Dual 4K HDMI 2.1 Adapter Power adaper Power cord 0.7-meter Thunderbolt 4 cable ThunderLok 4 Thunderbolt connector retainer clip Documentation | 
Compatibility
Mac Compatibility- Mac (M series Pro/Max/Ultra)
- Mac Studio additionally supports four (2002 model) or six (2023 model) displays with two or three Sonnet Thunderbolt Dual 4K HDMI 2.1 Adapters, respectively
- Mac (Intel) with Thunderbolt 3 ports
- Mac (Intel) with four Thunderbolt 3 ports (except Mac mini) additionally supports four 4K monitors with two Sonnet adapters
- Basic M series Macs are not compatible
- macOS 10.12.6+
- macOS Sonoma compatible
Windows Compatibility
- Windows computer with Thunderbolt 3, 4, or 5; or USB4
- Windows 11 and 10
Monitor Compatibility
- EDID Version 1.4
Application Compatibility
- Suitable for all applications


 
 
 
