• USB Type-C to Dual HDMI adapter
  • Ideal for connecting 2 HDMI displays to a USB-C port
  • Suitable for 4K Ultra HD
  • Thunderbolt 3 port compatible

This Startech USB Type-C to Dual HDMI Adapter lets you connect two HDMI® monitors to your USB-C™ computer. MST works on any Windows® device that supports DP Alt Mode over USB Type-C™, such as models of Dell Precision™ and Dell XPS™ laptops and ASUS® ROG GL752. The MST hub also works with Thunderbolt™ 3 ports to provide Thunderbolt 3 to dual HDMI conversion.

The USB-C HDMI hub is powered by the USB-C port, so you don't require an additional power adapter. This adapter works with USB Type-C devices that pass a DisplayPort video signal.

Increase your productivity with multiple monitors

The newest generations of laptops are more portable than ever. But, this could mean that you’re left with fewer video outputs and confined to your laptop's integrated screen. This USB-C MST hub solves these problems by letting you connect two independent HDMI displays through a USB-C port on your computer, which makes multitasking much easier.

Using the MST hub, you can extend your desktop onto additional monitors and stream independent content to each display. This makes it easier to multitask and increase your productivity -- perfect for creating a hot-desk solution with a wireless keyboard and mouse peripheral set.

The hub also lets you mirror the same image onto multiple displays, for remote viewing applications such as digital signage.

Astonishing picture quality that won’t drain your system resources

MST technology uses your existing video card to minimize the use of system resources while delivering Ultra HD 4K resolutions. 4K is supported by the latest A/V devices and offers four times the resolution of 1080p. Plus, because the MST hub can output high-definition 1080p, it's perfect for all high-resolution applications such as graphic design and CAD drawing.

The MSTCDP122HD USB-C to HDMI MST hub is backed by a StarTech.com 2-year warranty and free lifetime technical support.


  • Your USB-C equipped device must support video (DP Alt Mode) to work with this adapter.
  • MST shares 21.6Gbps across all attached displays. Higher resolutions can restrict the available bandwidth with the remaining ports, please see our guideline below for determining an ideal resolution for your setup.

    Average resolution bandwidth allocation
    1920x1080 (High-definition 1080p) @60Hz - 22%
    1920x1200 @60Hz - 30%
    2560x1440 @60Hz - 35%
    2560x1600 @60Hz - 38%
    3840 x 2160 (Ultra HD 4K) @30Hz - 38%

    Exceeding 100% will reduce functionality.

Form FactorHub
Case ColourBlack
In The Box1 x MST Hub 1 x Quick Start Guide
Dimensions5.8cm (W) x 6.2cm (D) x 1.3cm (H) - Weight 0.044kg
Interface(s)1 x USB-C (24-pin) DisplayPort Alt Mode Male Input 2 x HDMI (19-pin) Female Output
System Requirements
System RequirementsYour USB-C equipped device must support video (DP Alt Mode) to work with this adapter