StarTech Dual 4K Monitor Mini Thunderbolt 3 Dock

QuickFind: 861812 Mfr part code: TB3DKM2HD
  • Add dual UHD 4K HDMI monitors at 60Hz
  • Mac & Windows compatible
  • HDMI + RJ-45
  • 2 USB A, 1 USB3.0, 1 USB2.0
  • Universal

Product Description

StarTech Dual 4K Monitor Mini Thunderbolt 3 Dock


  • Add dual UHD 4K HDMI monitors at 60Hz to your laptop with this portable Thunderbolt 3 docking station
  • Connect your devices with 2x USB-A ports - 1x USB 3.0 and 1x USB 2.0
  • Add wired network connectivity with the Gigabit Ethernet RJ45 port



  • Review/edit images or media files on two 4K HDMI displays
  • Transfer a 4K movie in under 30 seconds
  • Ideal for shared or temporary work stations, such as hot desks (hoteling)



This Thunderbolt™ 3 docking station packs big performance into a cost-effective, compact mini dock, delivering essential connections for productivity. The bus-powered Thunderbolt 3 dock lets you connect to dual 4K HDMI displays, Gigabit Ethernet and two USB (Type-A) ports. Compatible with macOS and Windows®, it's the ideal accessory for your MacBook Pro, Dell™ XPS or other Thunderbolt 3 laptop.


Create a Dual-4K 60Hz Workstation

Great for editing 4K video or other Ultra HD tasks, this portable Thunderbolt 3 to HDMI dock supports 40Gbps of throughput and 4K resolution at 60Hz on dual HDMI monitors, through a single Thunderbolt 3 port. Run resource-demanding applications on two independent displays without draining system resources.


Connect your laptop to:

2x 4K HDMI displays (up to 4096 x 2160p @ 60Hz)


The Ports You Need Most

To enhance your productivity, the Gigabit Ethernet port (with PXE Boot and Wake-on-LAN support) ensures reliable wired network access. A USB 3.0 Type-A port, with ample space around it, lets you connect a USB device, such as a flash drive, for easy file access. Connect another USB device using the USB 2.0 Type-A port.


Bus Powered for Easy Portability

This mini dual 4K docking station offers a versatile solution for permanent and shared office workspaces. It's bus-powered, with no external power required. For flexible setup, the attached USB-C cable has an extended length of (7.9 in./ 20 cm).

The TB3DKM2HD is Thunderbolt Certified, and backed by a 3-year warranty and free lifetime technical support.




Industry Standards

  • Thunderbolt 3
  • IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
  • USB 3.0 - Backward compatible with USB 2.0 and 1.1
  • USB 2.0 - Backward compatible with 1.1


  • Auto MDIX
  • Compatible Networks: 10/100/1000 Mbps
  • Max Data Transfer Rate: 40 Gbps (Thunderbolt 3), 5 Gbps (USB 3.0), 2 Gbps (Ethernet; Full-Duplex)

Max Digital Resolutions:

  • Dual 4K displays - HDMI 4096 x 2160p @ 60Hz / 3840 x 2160p @ 60Hz


  • 1 - Thunderbolt™ 3 USB-C (24-pin) Male
  • 2 - HDMI Female
  • 1 - USB Type-A (9 pin) USB 3.0 Female
  • 1 - USB Type-A (4 pin) USB 2.0 Female
  • 1 - RJ-45 Female


  • Height 18.8 mm
  • Length 124 mm
  • Weight 145.8 g
  • Width 61 mm


  • USB-Powered


  • A 4K-capable display is required to achieve 4K x 2K resolution (4K is also known as 4K x 2K).


Technical Specification

StarTech Dual 4K Monitor Mini Thunderbolt 3 Dock

System Requirements

OS Required Microsoft Windows 7 / 8 / 8.1 / 10, Apple macOS 10.12 - 10.14


Product Type Docking station
Width 6 cm
Depth 12 cm
Height 1.88 cm
Weight 145.8 g
Enclosure Colour Black & grey


Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet
Compliant Standards IEEE 802.3, IEEE 802.3u, IEEE 802.3ab, USB 1.1, USB 2.0, USB 3.0, USB 3.1

Expansion / Connectivity

Interfaces 1 x USB-C 3.1 / Thunderbolt 3 - 24 pin USB-C ¦ 2 x display / video - HDMI - 19 pin HDMI Type A ¦ 1 x SuperSpeed USB 3.0 - 9 pin USB Type A ¦ 1 x USB 2.0 - 4 pin mini-USB Type A ¦ 1 x network - 10Base-T/100Base-TX/1000Base-T - RJ-45


Cables Included 1 x Thunderbolt 3 / USB-C cable - integrated - 20 cm
Features USB powered, dual display support, Preboot Execution Environment (PXE) support, full duplex support, 4K Ultra HD, auto MDIX support
Compliant Standards FCC, RoHS, UASP (USB Attached SCSI Protocol)

Manufacturer Warranty

Service & Support Limited warranty - 3 years

Dimensions & Weight (Shipping)

Shipping Weight 268.2 g

Environmental Parameters

Min Operating Temperature 5 °C
Max Operating Temperature 35 °C

Product Reviews

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StarTech Dual 4K Monitor Mini Thunderbolt 3 Dock

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