UGREEN exact SKU 50340
Add dual-band Wi-Fi 5 to a compatible USB computer
A compact AC1300-class USB 3.0 adapter using the documented RTL8812AU platform, with separate 5GHz and 2.4GHz link-rate ceilings.
01 · Product introduction
Overview
UGREEN 50340 AC1300 Dual-Band USB 3.0 Wi-Fi Adapter (CM492) is a compact AC1300-class USB 3.0 adapter using the documented RTL8812AU platform, with separate 5GHz and 2.4GHz link-rate ceilings.
This exact-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.
Research combines exact live UGREEN India product media with exact-model primary UGREEN material. Similar-looking adapters can use different chipsets, radios, speed ceilings and software.
Source reconciliation
Official sources identify CM492/50340 and RTL8812AU. Windows 11/10 plug-and-play is listed, while other Windows versions and macOS require an appropriate driver. Intel-Mac 10.11+ material exists, but Apple-silicon compatibility is not promised. Exact live art documents WPA/WPA2, not WPA3. The package image includes a driver CD, although modern computers may need the official download instead.
02 · At a glance
Key features
03 · Connector clarity
Every interface and indicator explained
04 · Performance planning
Link-rate ceilings and real throughput
The advertised AC1300 class combines separate theoretical link-rate ceilings: up to 867Mbps on 5GHz and up to 400Mbps on 2.4GHz. A client uses one band at a time; the figures are not added for one transfer.
5GHz normally offers more channel capacity and less congestion at short-to-medium range, while 2.4GHz generally travels farther and passes obstacles better.
Real file-copy and internet results are lower than the negotiated Wi-Fi rate because of protocol overhead, channel width, interference, router capability, distance and the remote server.
USB 3.0 gives the adapter enough host-link headroom for its Wi-Fi 5 class. A USB 2.0 host path can become a bottleneck.
The adapter cannot upgrade a Wi-Fi 4/5 router into Wi-Fi 6, nor can it exceed the router, ISP or remote-service ceiling.
05 · Complete path
What the host, cable or radio route must support
Use a dual-band 802.11ac or compatible router/access point to access the 5GHz Wi-Fi 5 feature set.
Install the exact CM492/RTL8812AU driver when the operating system does not provide a suitable one before expecting the wireless interface to appear.
For best reception, avoid placing the adapter directly behind a metal desktop tower, under a desk full of cabling or beside a strong USB 3.0 noise source.
Choose the router's 5GHz SSID for higher potential throughput and the 2.4GHz SSID when range or wall penetration is more important.
Security mode must be mutually supported by the router and driver. Exact live material confirms WPA/WPA2; WPA3-only networks are not promised.
06 · Network behaviour
Standards, negotiation and operating roles
Wireless class: IEEE 802.11ac with backward-compatible 802.11a/b/g/n operation as documented for the exact model.
Radio bands: 2.4GHz and 5GHz; there is no 6GHz Wi-Fi 6E radio.
Verified security in exact live artwork: WPA and WPA2 families. No WPA3 claim is made for this exact adapter.
Station mode connects the computer to an existing wireless network.
Official material also lists Soft AP/Wi-Fi sharing, but availability depends on the operating system, driver and local network-sharing policy.
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
- Before disconnecting an existing network, download the current exact CM492/RTL8812AU driver for the target operating system when required.
- Install the driver first if the official instructions for that OS require it, then restart if prompted.
- Insert the adapter into a USB 3.0 port with reasonable clearance and away from large metal obstructions.
- Open the operating system's Wi-Fi control, select the intended 5GHz or 2.4GHz network and enter its credentials.
- Confirm the network is using a mutually supported security mode and obtain an IP address from the router.
- Test close to the router first, then move the computer to its normal location and compare signal and stability.
10 · Software
Driver and operating-system guidance
Official sources list Windows 11/10 plug-and-play for supported builds; do not extend that statement to every Windows edition or installation state.
Older Windows releases require the matching driver. Use the official UGREEN CM492/RTL8812AU package, not a driver for a visually similar adapter.
UGREEN provides Intel-Mac driver material beginning at macOS 10.11, but later macOS releases can change kernel-extension and security requirements.
Apple-silicon macOS support is not verified by the exact primary sources and is deliberately not promised.
Linux support is conditional on distribution, kernel, architecture and driver build. Secure Boot may also prevent an unsigned module from loading.
The included optical disc is useful only on computers with a compatible drive; the current official download is the more practical installation source.
Driver discipline
Match the exact SKU, chipset, operating-system version and CPU architecture. A driver for a similar enclosure can be incompatible with the hardware inside.
11 · Verified scope
What this product does
- Adds dual-band Wi-Fi 5 networking to a compatible USB host.
- Supports a theoretical link ceiling up to 867Mbps on 5GHz or 400Mbps on 2.4GHz.
- Uses USB 3.0 and the exact documented RTL8812AU chipset.
- Can expose station mode and, on supported software, a Soft AP/network-sharing role.
12 · Clear boundaries
What this product does not do
- It is not a Wi-Fi 6 or Wi-Fi 6E adapter and has no 6GHz radio.
- It does not provide 1,300Mbps to one transfer; AC1300 is a rounded class combining two separate band ceilings.
- It cannot increase the speed of the internet plan, router backhaul or remote service.
- It does not guarantee Apple-silicon macOS, every Linux distribution or WPA3-only operation.
- It is not a router, modem, range extender or Ethernet adapter.
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 · Exact data
Technical specifications
| Specification | Verified exact-SKU detail |
|---|---|
| Brand / model | UGREEN CM492 / SKU 50340 |
| Adapter type | USB dual-band Wi-Fi 5 client adapter |
| Chipset | Realtek RTL8812AU |
| Host connector | USB-A 3.0 |
| Wireless standards | 802.11ac/a/b/g/n |
| 5GHz link ceiling | Up to 867Mbps |
| 2.4GHz link ceiling | Up to 400Mbps |
| Antenna | Internal dual-band design; 3dBi specified |
| Security verified in live art | WPA / WPA2 families |
| Operating roles | Station; Soft AP subject to OS/driver support |
| Listed weight | Approximately 15.3g |
| Driver scope | Exact OS/version dependent; official UGREEN packages available |
Package contents
- UGREEN CM492 AC1300 USB Wi-Fi adapter
- Driver CD as shown in exact package artwork
- User manual
Retail bundles can vary. Ethernet cables, routers, chargers, external power supplies or host adapters are not included unless they appear in the verified list above.
18 · Native collapsible answers
Product-specific FAQ
What exact model does this page cover?
This page covers UGREEN CM492, SKU 50340, using the documented RTL8812AU chipset.
What is the highest stated link speed?
The ceiling is up to 867Mbps on 5GHz or 400Mbps on 2.4GHz. One connection does not use both maxima at once.
Does it need a driver?
Windows 11/10 plug-and-play is listed for supported builds. Older Windows, Intel macOS and other systems need a matching, version-compatible driver.
Which hosts or network devices are compatible?
It is intended for compatible USB computers; Apple-silicon Macs and universal Linux support are not promised.
Will it make my internet faster?
No. It can improve the client link when the old adapter was limiting it, but the router, ISP and remote service still set their own ceilings.
Does it support or supply PoE?
No. This is a Wi-Fi client adapter and has no Ethernet or power-output function.
What do its USB or power connections actually do?
The USB-A plug carries adapter data and power only; it provides no pass-through, charging port or wired-network socket.
What cable or radio path should I use?
No Ethernet cable is used. Position the adapter with clear radio exposure and use a dual-band router for 5GHz operation.
Is warmth normal?
Slight warmth can occur during sustained traffic. Stop using it if heat, odour or connector damage is abnormal.
What should I check first if it does not work?
Install the exact driver, test in a direct USB 3.0 port near the router and confirm the intended band and security mode.
What is included in the box?
The exact package artwork shows the adapter, driver CD and user manual.
