UGREEN 35921 USB-C Ethernet Adapter, up to 5Gbps

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Product guide

UGREEN 35921 USB-C Ethernet Adapter, up to 5Gbps

UGREEN 35921 is a USB-C Ethernet adapter listed with a 5Gbps transfer rate for wired networking. That speed depends on a compatible USB 3.2 Gen 2 or faster port, a 5GbE network and Cat 6 or better cable, so it is not a guaranteed result on every setup.

At a glance

The manufacturer claims a 5Gbps wired network rate when the host port and network equipment support the required speeds.
Aluminium casing and an internal heat-dissipation design are claimed. At 5Gbps or 2.5Gbps, the adapter is said to switch to Lite Mode.
The feature listing describes support for Windows 11 and Linux Kernel 5.17 with drivers, and macOS 15 or later on Apple M3 chips and newer as plug and play.
Listed features include Wake-on-LAN, Wake-on-WAN, Energy Efficient Ethernet and Auto MDI/MDIX.

Price

£26.99Save 23%

Reference price: ~~£34.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

A USB-C connection provides a direct wired Ethernet option for a compatible laptop, tablet or listed IP camera.
The advertised 5Gbps rate may suit faster local-network transfers when the computer port, cable and network equipment all support it.
The listing specifies broad power-management and network features, including Wake-on-LAN and Energy Efficient Ethernet.

Cons

The 5Gbps capability depends on compatible host and network hardware, and customer feedback is mixed on achieving advertised speeds.
Apple compatibility is limited by the stated chip and operating-system requirements. The listing explicitly excludes M1 and M2 Macs.
The adapter has no indicator light, according to the listing.

Technical specifications

9 specifications

Identity
Brand	UGREEN
Model	35921

Connection and compatibility
Hardware interface	USB Type C
Data link protocol	Ethernet
Compatible devices	Internet Protocol Camera, Laptop, Tablet
Listed operating system family	Windows
Minimum required operating system version	Windows 10

Performance and physical details
Listed data transfer rate	5 Gigabits Per Second
Weight listed	82 Grams

What to know before buying

Listing details to confirm

For the claimed 5Gbps rate, the manufacturer specifies Cat 6 or higher cabling and a 5GbE-capable router, switch or server, plus a USB 3.2 Gen 2 (10Gbps) or faster host port. It advises connecting directly, avoiding hubs, docks, extensions and USB-to-USB-C adapters, and turning off computer energy-saving mode. Actual rates vary with network conditions, storage speed and operating system. Windows 11 and Linux Kernel 5.17 require drivers. The listing gives Windows 10 as the minimum OS version but separately says Windows 11 requires drivers. Customer feedback reports some USB 3.1 compatibility problems, mixed speeds and reliability, and concerns about heat, while the feature listing claims reduced heat and automatic Lite Mode at 5Gbps or 2.5Gbps. These reports and claims do not establish a universal outcome.

Who is it for?

A good fit for

Laptop users with a suitable USB-C port and 5GbE network equipment seeking a wired connection for faster local transfers.
Users of supported Windows or Linux systems who can install drivers when required.
Mac users with Apple M3 or newer chips running macOS 15 or later, after confirming their setup meets the stated requirements.

Less suited to

Mac users with M1 or M2 chips, which the listing explicitly says are unsupported.
Setups relying on a USB hub, docking station, extension cable or USB-to-USB-C adapter, contrary to the manufacturer's connection guidance.
Buyers who need an indicator light or require guaranteed 5Gbps performance from equipment that has not been confirmed to support it.

UGREEN 35921 USB-C Ethernet Adapter, up to 5Gbps · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 663 ratings

5 stars74%74%
4 stars10%10%
3 stars6%6%
2 stars3%3%
1 star7%7%

Customer feedback describes the adapter as well-built and appreciates its plug-and-play use, but also reports mixed experiences with compatibility, speed, reliability and value. Some customers say it can exceed 2.5GbE, while others report not reaching the advertised speed or the adapter stopping work. Heat is another concern. These reports matter most if you need sustained high-speed transfers, especially since the 5Gbps claim depends on compatible ports, cabling and network equipment, and the listing itself says heat management uses a Lite Mode at higher speeds.

Positive themes

Customers describe the adapter as well-built.
Some customers appreciate its plug-and-play functionality.

Negative themes

Some customers report compatibility issues with USB 3.1.
Some customers report that the adapter gets hot during use.

Mixed feedback

Feedback on speed is mixed, including reports of performance above 2.5GbE and reports that it does not reach advertised speeds.
Customers report mixed reliability, with some saying it works well and others saying it stops working.
Feedback on value is mixed, with some considering it overpriced.

Frequently asked questions

Will this adapter deliver 5Gbps on any USB-C port?

No. The manufacturer says the host must have a USB 3.2 Gen 2 (10Gbps) or faster port, and the cable and network equipment must also support the required speeds. Real transfer rates vary.

Which Macs are listed as compatible?

The feature listing says macOS 15 or later on Apple M3 chips and newer, and explicitly excludes M1 and M2. Confirm your exact device and OS before buying.

Does it work with Windows 11 and Linux?

The listing says Windows 11 and Linux Kernel 5.17 are supported with drivers. It separately lists Windows 10 as the minimum required version.

Does the adapter have an activity light?

No. The listing states that it does not have an indicator light.