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StarTech 2-Port Multi Monitor Adapter - USB-C to HDMI Video - MST Hub
SKU# AC21658, Model# MSTCDP122HD


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SKU # AC21658 | Model # MSTCDP122HD | Brand StarTech

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USB-C to HDMI adapter for multiple monitors works w/USB Type-C DP Alt-Mode Windows PCs to connect up to 2 independent displays - Dual 4K 30Hz or 1080p 60Hz HDMI monitors | DP 1.2/HBR2/MST Hub | Works w/ Thunderbolt 3 - Video splitter increases productivity by adding extended/mirrored screens - Multi Stream Transport hub works w/Dell XPS Precision Latitude/Lenovo ThinkPad X1 Carbon Extreme/Surface Laptop 3 Book 3 Pro 7/HP ProBook EliteBook Spectre ZBook - No Drivers Windows/Linux | 1' cable

Manufacturer Warranty: 2 Years Limited Warranty
Manufacturer Contact Info: http://www.StarTech.com.au,

This USB-C to HDMI MST Hub lets you connect two HDMI monitors to your USB Type-C Windows device, conveniently helping you to maximize your productivity. 

Multi-tasking Made Easy 

With devices becoming more portable than ever, you can be limited to fewer video outputs and confined to your small integrated screen. This multi-stream transport hub solves that problem by enabling you to connect two separate displays to your USB-C computer, making multi-tasking much easier. Using this USB-C to HDMI video splitter, you can mirror your display onto additional monitors or stream independent content to each display, which makes it the ideal accessory for travel or hot-desking.  

Possible monitor configurations with the MST hub

Astonishing Picture Quality 

MST technology uses your existing video card to minimize the use of system resources, while delivering UHD 4K resolutions for two monitors or displays simultaneously. With support for HD 1080p and UHD 4K the USB-C hub is perfect for all high-resolution applications such as graphic design and CAD drawing. 

Two monitors connected to the MST hub displaying two different applications

Hassle-Free Setup

Multi-stream transport offers an easy setup by natively working on any Windows device that supports DP Alt Mode over USB Type-C. This USB-C to HDMI hub is Thunderbolt 3 compatible, and offers plug-and-play installation with no drivers or software required. Additionally, this dual-monitor splitter is powered by the USB-C port, meaning no external power cords are necessary.   

MSTCDP122HD is backed by a StarTech.com 3-year warranty, and free lifetime technical support. 


Connector AUSB-C (24 pin) DisplayPort Alt Mode Male Input
Connector BHDMI (19 pin) Female Output
Operating Temperature5°C to 35°C (41°F to 95°F)
Storage Temperature-20°C to 60°C (-4°F to 140°F)
Chipset IDMegaChips - STDP4320
Parade - PS8402A
Packaging Information
Package Height32 mm [1.3 in]
Package Length17.4 cm [6.9 in]
Package Width14.4 cm [5.7 in]
Shipping (Package) Weight143 g [5 oz]
Maximum Digital Resolutions3840x2160 @ 30hz
Supported Resolutions

Note: MST shares 21.6 Gbps 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 (1080p) @60hz - 22%
1920x1200 @60hz - 30%
2560x1440 @60hz - 35%
2560x1600 @60hz - 38%
3840 x 2160 (Ultra HD 4K) @30hz - 38%

Note: Exceeding 100% will reduce functionality.

Wide Screen SupportedYes
Physical Characteristics
Cable Length33 mm [1.3 in]
Enclosure TypePlastic
Product Height1.3 cm [0.5 in]
Product Length62 mm [2.4 in]
Product Width58 mm [2.3 in]
Weight of Product44 g [1.6 oz]
Description CDW 75 - 1st LineStarTech.com 2-Port USB-C to HDMI MST Hub - 4K Dual Monitor Splitter
OS CompatibilityWindows 10, 8.1, 8
Special Notes / Requirements
NoteYour USB-C equipped device must support video (DP Alt Mode) to work with this adapter
What's in the Box
Included in PackageMST hub
quick-start guide

SKU # AC21658 | Model # MSTCDP122HD

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