Cudy WU5400 AX5400 Wi-Fi 6E USB Adapter

AX5400: The Cudy WU5400 is a tri-band Wi-Fi 6E USB adapter for Windows desktop PCs. It adds access to 2.4, 5 and 6 GHz Wi-Fi, with a USB 3.0 connection and manufacturer-claimed OFDMA and MU-MIMO support. The listing gives different figures for transfer rate and USB interface speed, so treat its headline performance claims as specifications to verify rather than measured results.

At a glance

Tri-band Wi-Fi 6E support includes 6 GHz alongside 5 GHz and 2.4 GHz.
A USB 3.0 connection is specified, and the listing says a USB 3.0 port is required for full speed.
The manufacturer lists OFDMA, MU-MIMO, BSS colouring and WPA3.
Windows 10/11 compatibility is claimed, with the 6 GHz band stated to require Windows 10 version 22H2 or later.

Price

£20.80Save 16%

Reference price: ~~£24.90~~

Price checked: 14 Nov 2026

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Pros and cons

Pros

Tri-band support can connect to a compatible 6 GHz network as well as 5 GHz and 2.4 GHz.
The listing specifies Wi-Fi capacity features including OFDMA and MU-MIMO, which may be useful on busy compatible networks.
A compact adapter is listed at 30L x 13W x 89H millimetres and 24.7 Grams.

Technical specifications

15 specifications

Identity
Brand	Cudy
Model	WU5400

Wireless and features
Advertised wireless class	AX5400
Advertised band rates	up to 2.4 Gbps on 6 GHz, 2.4 Gbps on 5 GHz, and 574 Mbps on 2.4 GHz
Wi-Fi features	OFDMA, MU-MIMO, and BSS Color technologies
Security	WPA3 security

Connection and compatibility
Hardware interface	USB 3.0
Data link protocol	USB
Data transfer rate	286 Megabits Per Second
Compatible devices	Desktop
Operating system family	Windows
Minimum required operating system version	Windows 10

Dimensions and installation
Dimensions listed	30L x 13W x 89H millimetres
Weight listed	24.7 Grams
Colour	Black

What to know before buying

Listing details to confirm

The listed data transfer rate of 286 Megabits Per Second conflicts with the separate AX5400 headline and band-rate claims, and the USB 3.0 speed claims also differ: one says up to 5Gbps while another says 5Gbps max. These are listing inconsistencies, not verified adapter performance. The listing describes the 6 GHz band as supported on Windows 10 version 22H2 and later, and also says Windows 10/11 or later. Confirm your OS version, USB port and router support before buying.

What’s in the box

Included

USB adapter

Who is it for?

A good fit for

Windows desktop users who need a USB Wi-Fi adapter and have a compatible Wi-Fi 6E router, especially where 6 GHz access is desired.
Buyers looking for listed OFDMA and MU-MIMO support for use on a compatible, busy wireless network.

Less suited to

Users who need confirmed real-world throughput or an adapter specification with consistent advertised speed figures.
Users on an operating system other than Windows, or those without a compatible USB 3.0 port or 6 GHz network when they need the advertised 6 GHz capability.

Cudy WU5400 AX5400 Wi-Fi 6E USB Adapter · photo 2 — Additional product photo 2

Customer reviews on Amazon

3.9 / 5 · 104 ratings

5 stars52%52%
4 stars19%19%
3 stars10%10%
2 stars5%5%
1 star14%14%

Aggregate ratings are mixed overall, with a majority in the five-star category but a notable share in the one-star category. Without customer comments, these figures do not show what users liked or disliked or explain performance. For buyers, the listing's inconsistent speed claims make independent confirmation of expected throughput particularly relevant.

Frequently asked questions

Does the Cudy WU5400 support 6 GHz Wi-Fi?

The listing claims 6 GHz support. It specifies Windows 10 version 22H2 or later for the 6 GHz band, and a compatible Wi-Fi 6E router is also needed.

Which operating systems are listed as compatible?

The listing specifies Windows 10/11 or later and gives Windows as the compatible operating system family. It does not provide support details for other operating systems.

Does it need a USB 3.0 port?

The listing says USB 3.0 is required for full speed. It also gives inconsistent USB speed claims, so do not treat those figures as verified throughput.

What does the listing claim about wireless speed?

It labels the adapter AX5400 and lists rates of up to 2.4 Gbps on 6 GHz, 2.4 Gbps on 5 GHz and 574 Mbps on 2.4 GHz. A separate data transfer rate is listed as 286 Megabits Per Second, so the speed details are inconsistent.