The UGREEN Bluetooth 5.0 USB Adapter (Model: CM390 / 80889) is an ultra-compact dongle designed to add high-speed wireless connectivity to Windows-based PCs and laptops . Key Features
Bluetooth 5.0 + EDR: Provides faster data transmission, higher stability, and lower power consumption compared to older versions .
Multi-Device Connectivity: Supports simultaneous connection for up to 5 devices, such as headsets, mice, keyboards, game controllers, and printers .
Extended Range: Offers a reliable transmission distance of up to 20–30 meters (approx. 66–100 feet) in open spaces without obstructions .
Status Indicator: Features a built-in LED that flashes during pairing and remains solid once a connection is successfully established .
System Compatibility: Primarily designed for Windows 11, 10, 8.1, and 7; it is not compatible with macOS or iOS devices . Driver Installation Guide
While the adapter is often plug-and-play for modern Windows systems, manual installation is recommended for full functionality on older versions or if automatic setup fails . UGREEN CM390 Bluetooth Adapter User Guide - device.report
0 USB Adapter (CM390) driver on your system. Driver Installation for UGREEN Bluetooth 5.0 (CM390)
The UGREEN CM390 adapter typically uses the Realtek RTL8761B chipset. While Windows 10 and 11 often attempt to install a generic driver automatically, the official driver is required to unlock the full Bluetooth 5.0 features and ensure stable connectivity. 1. Download the Official Driver Visit the official UGREEN Download Center. Search for model number CM390 or "Bluetooth 5.0 Adapter." ugreen bluetooth 50 usb adapter cm390 driver install
Download the driver package specifically for Windows (usually supports Windows 7, 8.1, 10, and 11). 2. Pre-Installation Steps
Disable Built-in Bluetooth: If your laptop or desktop already has an internal Bluetooth chip, you must disable it first. Go to Device Manager > Bluetooth, right-click the internal adapter (e.g., Intel Wireless Bluetooth), and select Disable device.
Remove Old Adapters: Unplug any previous Bluetooth dongles before starting the setup. 3. Installation Process
Extract the Files: The driver usually downloads as a .zip file. Right-click and extract all files to a folder.
Run Setup: Locate the setup.exe file within the extracted folder.
Follow the Wizard: Double-click the installer and follow the on-screen prompts.
Insert the Adapter: When prompted by the installer (or after the installation completes), plug the UGREEN CM390 into a USB 2.0 or 3.0 port.
Restart: Once the installation finishes, restart your computer to finalize the driver integration. 4. Verifying the Installation To confirm the adapter is working correctly: Open Device Manager. Look under the Bluetooth section. The UGREEN Bluetooth 5
You should see "Realtek Bluetooth 5.0 Adapter" listed without any yellow warning icons. Troubleshooting Tips
USB Port: If the device isn't recognized, try a different USB port, preferably one directly on the motherboard (back of the PC) rather than a front panel or hub.
Driver Error: If you see a "Driver Error" message in Windows Settings, uninstall the device from Device Manager, unplug it, and run the setup.exe again as an Administrator.
UGREEN Bluetooth 5.0 USB Adapter (Model CM390) is a compact dongle designed to add high-speed, long-range wireless connectivity to PCs. While newer Windows versions may handle it automatically, a manual driver installation is often required for full compatibility on Windows 7, 8.1, and 10. device.report 1. Driver Installation Methods You can install the drivers through two primary methods: Official Website (Recommended): Navigate to the UGREEN Download Center Search for product model Download the ZIP file containing the Realtek Bluetooth Drivers Extract the files and run Provided Driver CD: Insert the CD into your computer's drive. Locate the folder corresponding to the and double-click to begin the UGREEN installation wizard 2. Step-by-Step Setup Guide UGREEN CM390 Bluetooth 5.0 USB Adapter User Manual
This is rarely a driver issue.
UGreen’s official support page rarely hosts the Windows 11 driver directly, but they provide a link to a virtual CD.
.zip file (usually named Bluetooth 5.0 Driver for Windows.rar).Setup.exe yet.Setup.exe as Administrator.Evan found the tiny UGREEN Bluetooth 5.0 USB adapter tucked under a stack of manuals like a secret. The silver dongle was no bigger than his thumb, but the label—CM390—felt like the name of a ship about to sail.
He plugged it into his laptop’s lone USB port. For a moment nothing happened; the machine was an indifferent harbor. Then a barely audible chime: a device was detected. Windows spun its wheels trying a driver from its own stores and failed with a polite notification: “Driver not found.” Bluetooth pairs but disconnects immediately This is rarely
Evan smiled. He liked small technical quests. He grabbed his phone, typed “UGREEN CM390 driver install,” and skimmed the first result. The official download page promised a packaged driver optimized for the CM390 chipset and a brief guide. He downloaded the zip, eyes on the progress bar like a navigator watching the horizon.
Step one, the guide said: extract and run setup as administrator. Evan followed orders. The installer window opened with unassuming grey buttons and a progress bar that crept forward. Midway it asked whether to allow changes—his laptop’s security asking permission like a customs official. He clicked “Yes.”
Drivers installed. The installer finished and offered to reboot. He chose “Restart now.” When the system came back, the Bluetooth icon appeared in the taskbar like a lighthouse finally lit. He clicked it and started pairing his old wireless headphones. The headphones blinked, the adapter pulsed, and the two devices greeted each other with a chirp—the digital equivalent of a handshake.
Music flowed clean and crisp. Evan leaned back, satisfied. The CM390’s firmware update option in the installer promised better stability; he accepted and let the utility apply the patch. A tiny progress notification climbed slowly, then completed. “Update successful,” it said. Evan felt oddly proud—a small, quiet victory.
Later that night, he moved the adapter to his travel laptop. This time the OS recognized the device automatically and fetched a compatible driver without his intervention. The two laptops, different as they were, now shared the same small secret: a compact dongle that made wired things wireless.
The CM390 stayed in his bag from then on—small, dependable, a reminder that some problems are solved with a little patience and the correct driver. And when friends asked how he made audio so seamless during remote game nights, he would just smile and hand them the tiny silver stick, as if offering a trinket that held a solved puzzle.
The end.
Struggling to get your new UGREEN Bluetooth dongle to work? You are not alone.
The UGREEN Bluetooth 5.0 USB Adapter (Model CM390) is one of the most popular dongles on the market because it’s cheap, tiny, and generally reliable. However, there is a massive point of confusion for new users: The driver installation.
If you just plugged it in and nothing happened (or you see "Unknown USB Device"), this guide is for you.