UGREEN AC650 Nano Dongle CM448 – Mini Dual Band USB WiFi Adapter

The UGREEN CM448 is a nano-sized USB 2.0 wireless adapter that adds dual band 802.11ac Wi-Fi to any desktop or laptop with a spare USB port. It measures just 40 × 19 × 9 mm, fits in a pocket or office bag, and remains inconspicuous when left plugged into a computer or laptop. Unlike the CM496, which uses an external rotatable antenna, the CM448 houses an integrated PIFA antenna in a flush plug-and-forget form factor — making it the better choice for users who want permanent, unobtrusive wireless connectivity rather than maximum signal range.

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Technical Specifications

Wireless Performance

Interface and Chipset

Security and Operating Modes

Compatibility

Physical

Package Contents

Warranty

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Use Cases and Applications

Permanent Plug-and-Forget Wireless on a Laptop

The primary advantage of the CM448 over the CM496 is its nano form factor. Users who want to leave the adapter permanently in a USB port — particularly on a laptop that travels between desks, bags, and docking stations — benefit from its flush profile. The CM448 does not snag on adjacent devices, does not add visible bulk to the machine, and does not need to be removed before closing a laptop bag. It suits commuters and mobile workers who need wireless connectivity restored to a machine without drawing attention to additional hardware.

Adding 5GHz Access to Older Desktops and Laptops

Many budget desktops and older laptops ship with 2.4GHz-only wireless hardware or no wireless hardware at all. The CM448 provides a straightforward route to 5GHz connectivity without internal hardware access. Plug it into any available USB port, allow Windows 10 or 11 to install the built-in driver, and the machine immediately connects to the less congested 5GHz band. Furthermore, the auto band-switching function selects the strongest available channel without requiring user intervention.

Portable Internet Sharing via Soft AP

In a hotel, temporary office, or shared workspace with only a single wired Ethernet point, the CM448’s Soft AP mode allows one connected laptop to broadcast a private Wi-Fi hotspot. A colleague’s phone, tablet, or second laptop connects through this hotspot while the host routes traffic over Ethernet. Additionally, this approach avoids exposing additional devices directly to an untrusted shared network, as all traffic routes through the host machine.

macOS Users on Intel-Based Machines

The CM448 works on macOS 10.11 through 11.6 (Big Sur) with driver installation via the UGREEN website or included CD. This covers the majority of Intel MacBook Air and MacBook Pro models from 2015 onwards. However, users should confirm their macOS version before purchase — the adapter does not support macOS 12 Monterey and above, and Apple Silicon MacBooks (M1, M2 chips) are not compatible. For those users, a USB-A to USB-C adapter is also needed, as MacBooks from 2016 onwards carry only USB-C ports.

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How Does the CM448 Compare to the CM496?

Both adapters share the AC650 speed rating and the RTL8811CU chipset, and both deliver 433Mbps on 5GHz and 200Mbps on 2.4GHz. The key difference is physical design. The CM448 uses an integrated PIFA antenna in a 40 × 19 × 9 mm nano body — ideal for permanent installation where discretion and portability matter. The CM496 carries a 6dBi external antenna that rotates at 90° and 180°, providing stronger signal reach through walls and over distance. Users in environments with thick walls, weak signal, or a router positioned far from the PC should choose the CM496. Users who prioritise portability and an unobtrusive fit should choose the CM448.