UGREEN SKU 90340
Dual-band Wi-Fi 6 for a supported USB computer
An AX1800-class USB 3.0 adapter with the documented RTL8832AU chipset, internal dual antennas and explicit Windows-first compatibility.
01 · Product introduction
Overview
UGREEN 90340 AX1800 Wi-Fi 6 USB 3.0 Adapter (CM499) is an AX1800-class USB 3.0 adapter with the documented RTL8832AU chipset, internal dual antennas and explicit Windows-first compatibility.
This model guide separates link-rate ceilings from real throughput, explains what the entire cable or radio path must support, and states when operating-system or driver compatibility is conditional.
Sources identify CM499/90340 and RTL8832AU. The retail product support statement is Windows 10/11. UGREEN now publishes a Linux-family driver, but support remains kernel/distribution dependent. No macOS support is promised. AX1800 is the rounded sum of separate 1201Mbps and 574Mbps band ceilings, not simultaneous client throughput.
02 · At a glance
Key features
03 · Connector clarity
Every interface and indicator explained
04 · Performance planning
Link-rate ceilings and real throughput
AX1800 is a rounded class label combining up to 1201Mbps on 5GHz and up to 574Mbps on 2.4GHz. The client selects one band for a connection.
Real application throughput is lower than the negotiated PHY link because Wi-Fi shares airtime and adds protocol, encryption and retransmission overhead.
Wi-Fi 6 features can improve efficiency when the router, channel configuration, client driver and surrounding network also support them.
5GHz provides the higher model ceiling but has shorter effective range through walls; 2.4GHz generally reaches farther and is often more congested.
A USB 2.0 connection can constrain performance even though the plug fits. Use USB 3.0 when evaluating the adapter.
05 · Complete path
What the host, cable or radio route must support
A Wi-Fi 6 router or access point is needed for 802.11ax operation; the adapter remains backward compatible with documented a/ac/b/g/n networks.
Install the CM499/RTL8832AU driver for the target operating system when it is not already available.
Choose 5GHz close to the access point for throughput and 2.4GHz where reach matters more.
Keep the adapter clear of the metal rear panel of a desktop, dense cable bundles and high-noise USB equipment.
The router, ISP plan, channel width, congestion and remote server must all support the desired result.
06 · Network behaviour
Standards, negotiation and operating roles
Wireless standards: IEEE 802.11ax/a/ac/b/g/n.
Bands: 2.4GHz and 5GHz only.
Official security material lists WPA3, WPA2, WPA and legacy WEP. Prefer WPA3 or WPA2 where the complete network supports it; WEP is obsolete and insecure.
This adapter creates a client network interface; it is not a router, modem or guaranteed wireless repeater.
Ceiling, not a promise
A port, radio or USB label is a signalling ceiling. Real performance depends on the complete path, protocol overhead, local conditions and the devices at both ends.
07 · Device fit
Compatible devices and systems
08 · Practical value
Use scenarios
09 · Usability
Setup and usability guidance
- Download the CM499/RTL8832AU driver before removing an existing working network connection.
- Install according to the target operating system's instructions and restart if requested.
- Connect the adapter directly to a USB 3.0 port with clear physical and radio space.
- Open Wi-Fi settings, choose the intended 5GHz or 2.4GHz SSID and enter the network password.
- Prefer WPA3 or WPA2; avoid enabling WEP merely to accommodate legacy equipment.
- Test near the router first and inspect the negotiated link before comparing internet speed.
10 · Software
Driver and operating-system guidance
The retail support statement is Windows 10 and Windows 11; keep this narrower than a generic 'works with any computer' claim.
Use the official UGREEN package for CM499/RTL8832AU, matching system architecture and release.
UGREEN's current download centre also lists a Linux-family driver, but that does not make every kernel or distribution plug-and-play.
Secure Boot can block an unsigned or locally compiled Linux kernel module.
Do not substitute drivers for similar-looking AX1800 adapters with different chipsets.
Driver discipline
Match this SKU, chipset, operating-system version and CPU architecture. A driver for a similar enclosure can be incompatible with the hardware inside.
11 · scope
What this product does
- Adds dual-band 802.11ax Wi-Fi 6 to a compatible USB host.
- Supports separate theoretical ceilings up to 1201Mbps on 5GHz and 574Mbps on 2.4GHz.
- Uses USB 3.0, internal dual antennas and the documented RTL8832AU chipset.
- Supports WPA3 where the access point, OS and driver are configured compatibly.
12 · Clear boundaries
What this product does not do
- It does not support the 6GHz band and is not Wi-Fi 6E.
- It does not deliver 1,800Mbps to one transfer or add the two bands for one client session.
- It cannot make a slower router, internet plan or server operate faster.
- It does not have macOS support.
- It is not a router, modem, Ethernet adapter or PoE device.
13 · Best practice
What to do
14 · Common mistakes
What not to do
15 · Read before use
Warnings and limitations
16 · Diagnostics
Troubleshooting by symptom
17 · data
Technical specifications
| Specification | Specification |
|---|---|
| Brand / model | UGREEN CM499 / SKU 90340 |
| Adapter type | USB dual-band Wi-Fi 6 client adapter |
| Chipset | Realtek RTL8832AU |
| Host connector | USB-A 3.0 |
| Wireless standards | 802.11ax/a/ac/b/g/n |
| 5GHz link ceiling | Up to 1201Mbps |
| 2.4GHz link ceiling | Up to 574Mbps |
| Antenna | Internal dual-antenna design |
| Security | WPA3 / WPA2 / WPA; legacy WEP listed |
| Retail OS scope | Windows 10 / Windows 11 |
| Conditional driver availability | Linux family package; version-dependent |
| macOS | Not verified / not promised |
Package contents
- UGREEN CM499 AX1800 USB Wi-Fi 6 adapter
- User manual
Retail bundles can vary. Ethernet cables, routers, chargers, external power supplies or host adapters are not included unless they appear in the list above.
18 · Native collapsible answers
Product-specific FAQ
What model does this page cover?
This page covers UGREEN CM499, SKU 90340, using the documented RTL8832AU chipset.
What is the highest stated link speed?
The adapter links up to 1201Mbps on 5GHz or 574Mbps on 2.4GHz; AX1800 is a rounded class, not one 1,800Mbps transfer.
Does it need a driver?
Use the current driver when Windows does not load it. Linux is conditional on kernel and distribution; macOS is not promised.
Which hosts or network devices are compatible?
The retail scope is compatible Windows 10/11 USB computers, with conditional Linux driver availability.
Will it make my internet faster?
No. It can remove a client-side bottleneck but cannot exceed the router, ISP plan, congestion or remote service.
Does it support or supply PoE?
No. It is a wireless client adapter with no Ethernet or power-output port.
What do its USB or power connections actually do?
The USB-A plug carries adapter power and data only. It has no charging, video or USB pass-through role.
What cable or radio path should I use?
No Ethernet cable is used; good placement and a compatible dual-band router determine the radio path.
Is warmth normal?
Some warmth is possible during sustained traffic. Disconnect it if heat, smell or instability becomes abnormal.
What should I check first if it does not work?
Verify the driver, USB 3.0 connection, intended radio band, access-point mode and security setting.
What is included in the box?
The base package includes the CM499 adapter and user manual.
