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Compact gray USB-C adapter with two HDMI ports and short cable

STARTECH

STARTECH MST14CD122HD USB-C to Dual HDMI video adapter 4K 60Hz

SKU CH-K94E-AX017 MPN MST14CD122HD

Connects a USB-C port to two 4K 60 Hz HDMI monitors with a 30 cm cable

  • Changer TypeUSB to HDMI
  • ColorGray
  • Cable Length1 ft.
  • Connector A1x USB-C
  • Connector B2x HDMI
  • Drives two 4K 60Hz displays from one USB-C port
  • Bus-powered with 30 cm cable for tidy desk setup
  • Driverless plug-and-play on Windows — no software to install
  • Supports 2.1-channel audio and HDR over HDMI
  • Compatible with USB4, TB4 and TB3 hosts

USB-C to Dual HDMI MST Adapter

The StarTech.com MST14CD122HD connects two HDMI monitors to a single USB-C port with DisplayPort Alt Mode. It supports dual 4K 60Hz or dual 1080p 60Hz extended or mirrored displays. A 1 ft tethered cable and bus-powered design keep the setup compact and portable. Driverless operation works immediately on Windows.

Windows Users Needing Two External Displays

This adapter suits professionals expanding a laptop workspace across two HDMI screens without a dock. It requires a host port that supplies DisplayPort 1.4 MST signalling and is not compatible with macOS. Buyers whose USB-C ports carry only data or power cannot use this device for video output.

Requires Host DP 1.4 Alt Mode with MST

The single specification that decides compatibility is whether the computer's USB-C port implements DisplayPort 1.4 Alternate Mode with Multi-Stream Transport. Without that specific host capability the adapter will not drive two independent 4K 60Hz streams.

Highlights

  • Drives two 4K 60Hz displays from one USB-C port
  • Bus-powered with 30 cm cable for tidy desk setup
  • Driverless plug-and-play on Windows — no software to install
  • Supports 2.1-channel audio and HDR over HDMI
  • Compatible with USB4, TB4 and TB3 hosts

Specifications

BrandStarTech.com
ModelMST14CD122HD
Part NumberMST14CD122HD
Changer TypeUSB to HDMI
ColorGray
Cable Length1 ft.
Connector A1x USB-C
Connector B2x HDMI
Shipping weight0.23 kg
Package size152 × 102 × 51 mm

Questions about this item

Will this USB-C adapter drive two older 1080p monitors at 60 Hz alongside my new 4K display?

The adapter supports two 1080p 60 Hz HDMI displays or two 4K 60 Hz displays from a USB-C DP Alt-Mode port on Windows.

How can I verify the MST hub is delivering 4K 60 Hz to both HDMI ports after I plug it in?

Open Windows Display Settings and confirm each HDMI output shows 4K resolution at 60 Hz; the hub supports dual 4K 60 Hz or dual 1080p 60 Hz modes.

Does the box include the two HDMI cables I need, or only the adapter with its built-in 1 ft USB-C lead?

The package contains the USB-C to Dual HDMI MST hub with its integrated 1 ft cable; HDMI cables for the monitors are sold separately.

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