UGREEN 40273 • USB-C TO HDMI ADAPTER
A compact white adapter for one 4K 30Hz HDMI display
UGREEN 40273 connects a compatible USB-C video source to a standard HDMI cable through a 20cm integrated lead. It supports one HDMI display up to 4K at 30Hz and works without a separate driver on supported systems.
Product overview
Overview
A clear view of the product before you connect it
This adapter is for a USB-C host that can output video through DisplayPort Alternate Mode, USB4 or a compatible Thunderbolt connection. It converts that supported video path to a standard HDMI female socket for one monitor, television or projector.
The maximum listed output is 4K at 30Hz. The source, operating system, HDMI cable and display must all support the selected resolution and refresh rate. Compatible HDMI audio can travel with the video when the host and receiving equipment support the audio format.
The 20cm attached cable offers short strain relief between the host connector and the adapter body. The product is unidirectional from USB-C source to HDMI display and does not carry USB data, provide Power Delivery charging or operate in reverse.
Product highlights
Key features
Maximum HDMI output with a compatible USB-C video source and display.
Integrated white USB-C cable for practical adapter placement.
USB-C source to HDMI display only; reverse operation is unsupported.
No driver or external power on a standards-compatible path.
At a glance
A direct, one-way USB-C video connection
USB-C male input
Connects to a host port that supports video output. Connector shape alone is not enough.
HDMI female output
Accepts a standard HDMI male cable leading to one monitor, television or projector.
20cm integrated lead
Provides flexible placement beside the host without a separate USB-C cable.
White compact housing
A lightweight adapter body designed for desk, classroom, meeting-room and travel use.
DISPLAY OUTPUT
Mirror a presentation or extend a compatible desktop
Use the adapter with an HDMI-equipped display for documents, photographs, video playback, presentations and a larger workspace. The host operating system controls whether the external screen mirrors the built-in display or acts as an extended desktop.
The adapter supports up to 4K at 30Hz. If the screen is blank or motion feels slow, select a mutually supported lower resolution or refresh rate and retest with a known-good HDMI cable.
- One HDMI display
- Up to 4K at 30Hz
- Mirror or extend where the host supports it
- Compatible HDMI audio
- No driver normally required
HOST REQUIREMENT
USB-C must carry a video signal
USB-C describes a connector, not a guaranteed feature set. A charging-only or data-only USB-C port cannot produce HDMI video through this adapter. Look for DisplayPort Alternate Mode, USB4 display support or a compatible Thunderbolt symbol in the host documentation.
Selected MacBook, Chromebook, Windows laptop, tablet and smartphone models support external displays, but compatibility must be checked by exact model and port.
- DisplayPort Alt Mode
- Compatible Thunderbolt video
- USB4 display output
- Host GPU and operating-system support
- A supported HDMI display mode
PORTABLE HARDWARE
Carry one small adapter and use the HDMI cable at the venue
The 20cm lead and 22g listed weight make the adapter easy to keep in a laptop sleeve or presentation pouch. It is useful when a slim USB-C device has no built-in HDMI socket.
A separate HDMI cable is still required. Choose a cable rated for the intended resolution, support the cable's weight and avoid sharp bends at the integrated USB-C lead.
- No external power input
- No software installation for normal operation
- No detachable USB-C cable to forget
- HDMI cable not confirmed as included
- Protect the integrated lead from strain
Real-world workflows
Use scenarios
A direct display adapter for common everyday situations
Meeting room
Connect a compatible USB-C laptop to an HDMI projector or conference-room display for slides and documents.
Second screen
Extend a supported laptop desktop to one HDMI monitor for additional application space.
Television playback
Mirror compatible photographs or video from a laptop, tablet or selected phone to an HDMI television.
Travel kit
Keep the lightweight adapter with a known-good HDMI cable for hotel, classroom or temporary-desk displays.
Compatibility
Compatible devices and systems
Compatible with video-capable USB-C hosts and HDMI displays
Mac computers
Works with compatible MacBook and other Mac USB-C/Thunderbolt ports that support external video.
Windows and ChromeOS
Compatible laptops and Chromebooks can use the adapter when the selected USB-C port exposes DisplayPort video.
Tablets and phones
Selected iPad, Android tablet and smartphone models provide external video; many USB-C mobile devices do not.
HDMI destinations
Connect a monitor, TV, projector or receiver that accepts the source's selected HDMI resolution and audio format.
Important limitations
Check before buying
Check these points before ordering or connecting:
- Confirm the host USB-C port explicitly supports external video.
- The signal direction is USB-C source to HDMI display only.
- Maximum output is 4K at 30Hz; this is not a 4K 60Hz adapter.
- A standard HDMI cable is required and is not verified as included.
- The adapter does not provide USB data ports or USB-C Power Delivery charging.
- Protected streaming may require compatible HDCP support across the host, application, adapter path and display.
- Some mobile operating systems mirror only or restrict certain applications on external displays.
- A USB-C port on a monitor cannot be used as the output destination through this adapter.
Function boundaries
What it can—and cannot—do
What this product does
- Converts a compatible USB-C DisplayPort video signal to standard HDMI.
- Connects one HDMI display up to the mutually supported 4K 30Hz mode.
- Carries compatible HDMI audio together with video.
- Supports mirror or extended-desktop modes controlled by the host.
- Works without separate power or a normal driver installation on supported systems.
- Provides a 20cm integrated cable and compact white housing.
What this product does not do
- It does not work from an HDMI source to a USB-C display.
- It does not add video output to a USB-C port that lacks it.
- It does not support 4K at 60Hz.
- It does not charge the host or provide Power Delivery pass-through.
- It does not transfer ordinary USB files or add USB peripheral ports.
- It does not capture HDMI video, upscale resolution or bypass HDCP.
Guided connection
Setup and usability guidance
Verify video support, connect HDMI, then choose the display mode
- Check the host manual or port specification for DisplayPort Alt Mode, USB4 display output or compatible Thunderbolt video.
- Connect the adapter's USB-C male plug directly to the supported host port.
- Connect a suitable standard HDMI cable between the adapter and the display.
- Select the matching HDMI input on the monitor, television or projector.
- Open the host display settings and choose mirror or extended desktop, then select a supported resolution.
- If no picture appears, test a lower mode and a short known-good HDMI cable before changing other equipment.
- Disconnect by holding connector bodies rather than pulling the integrated cable.
Good practice
Do and avoid
What to do
- Check host-port video support before purchase.
- Use an HDMI cable rated for the required resolution and refresh rate.
- Select a display mode supported by the source and destination.
- Keep the adapter dry and allow space around the housing.
- Update graphics and operating-system software when display detection is unreliable.
- Support the HDMI cable so it does not strain the USB-C connector.
What not to do
- Do not connect HDMI as the source and expect USB-C output.
- Do not force 4K60, Power Delivery or USB data through the adapter.
- Do not bend the 20cm lead tightly or pull the adapter by its cable.
- Do not use damaged, loose or wet connectors.
- Do not assume every streaming service or mobile application permits external output.
- Do not use the product as a capture card or USB docking hub.
Safe operation
Warnings and limitations
Safety note 1
A USB-C connector does not guarantee video support. This is the most important compatibility check for the product.
Safety note 2
4K at 30Hz can appear less smooth for cursor movement than a 60Hz mode. Choose a lower resolution if motion smoothness is the priority.
Safety note 3
A blank screen can result from the wrong HDMI input, unsupported resolution, cable failure, port incompatibility or HDCP restrictions.
Safety note 4
Keep the attached cable free of sharp bends and side load to protect the host USB-C port.
Safety note 5
Stop use if the connector, cable or housing is damaged or unusually hot.
Verified specifications
Technical specifications
| Brand | UGREEN |
|---|---|
| SKU | 40273 |
| Product type | USB-C to HDMI display adapter |
| Input | USB-C male |
| Output | HDMI Type-A female |
| Direction | USB-C video source to HDMI display only |
| Maximum resolution | Up to 3840 × 2160 at 30Hz |
| Lower resolutions | Supported where mutually compatible |
| Cable length | 20cm integrated USB-C lead |
| Listed weight | 22g |
| Colour | White |
| Host requirement | DisplayPort Alt Mode, USB4 display output or compatible Thunderbolt video |
| External displays | One through HDMI |
| Power Delivery | Not supported |
| USB data | Not supported |
| Installation | Plug and play on compatible systems |
In the box
Package contents
- 1 × UGREEN 40273 white USB-C to HDMI adapter with integrated 20cm cable
A standard HDMI cable is required and is not verified as included. The adapter itself does not require a charger or separate power supply.
Helpful answers
Product-specific FAQ
Will it work with any USB-C port?
No. The selected port must support DisplayPort Alt Mode, USB4 display output or compatible Thunderbolt video.
What is the maximum resolution?
The maximum listed output is 4K at 30Hz with a compatible source, HDMI cable and display.
Does it support 4K at 60Hz?
No. Choose a different verified model when 4K at 60Hz is required.
Can I connect an HDMI laptop to a USB-C monitor?
No. The adapter is unidirectional from a USB-C video source to an HDMI display.
Does it carry audio?
It can carry compatible HDMI audio with the video when the host, content and receiving equipment support the selected format.
Can it charge my laptop?
No. UGREEN 40273 has no Power Delivery input or charging pass-through.
Does it transfer USB data?
No. It is a display adapter, not a USB data hub.
Do I need to install a driver?
Normally no on a supported host. The computer must already provide a compatible USB-C video signal.
Is an HDMI cable included?
A separate standard HDMI cable is required and is not verified as a package item.
Why is the screen blank?
Check host-port video capability, the HDMI input, cable, resolution, graphics settings and any HDCP restriction. Test with one short known-good cable.
Can a phone use this adapter?
Only selected phones that support wired external video over USB-C. Many USB-C phones provide charging and data but no display output.
Exact-model verification
Research and source note
Exact SKU 40273 media verify the white USB-C male to HDMI female direction, 20cm integrated lead and 4K30 maximum. Reverse conversion, Power Delivery, USB data and an included HDMI cable are not claimed.
