Elena had been staring at the little silver UGREEN CM390 for an hour. It sat in the USB port like a tiny monolith — plugged in, lights blinking, but her Bluetooth speaker stayed silent.
She’d bought it after her laptop’s internal Bluetooth died. “Plug and play,” the box promised. But the speaker only hummed with static, and her wireless mouse refused to click.
Frustrated, she opened her laptop, navigated to Device Manager, and found the culprit: a yellow exclamation mark beside “Unknown USB Device.”
“You’re not unknown,” she whispered. “You’re a CM390.”
She pulled up UGREEN’s site on her phone and found the driver buried under “Support → Drivers → Bluetooth 5.0 Adapter (Realtek).” Her fingers flew across the keyboard: download, extract, run as administrator. The installer flickered, asked for a restart, and she complied.
When the desktop reloaded, the Bluetooth icon in the taskbar was solid.
She clicked “Add Device.” The speaker appeared instantly. Music flowed out — crisp and clear.
Her mouse jumped back to life.
Elena leaned back, glancing at the tiny silver adapter. “Took your time,” she said.
It blinked once, in what she chose to believe was a wink.
UGREEN Bluetooth 5.0 USB Adapter (Model CM390 / 80889) widely regarded as a reliable, budget-friendly solution for adding Bluetooth connectivity to PCs
. It is particularly praised for its stability with gaming controllers and low audio latency. Key Performance Highlights Device Capacity: Supports simultaneous connection for up to , such as headsets, mice, and keyboards. Rated for up to 20–30 meters
in open areas, though real-world use typically covers 1 to 1.5 rooms.
Features low audio delay (approx. 100ms), making it suitable for video and light gaming. Compatibility: Works with Windows (7/8.1/10/11) and Linux. It is not compatible with PS5, PS4, or Nintendo Switch. Driver Installation Guide
While the device is "Plug and Play" on Windows 10 and 11, manual driver installation is often required for Windows 7/8.1 or to resolve stability issues. UGREEN CM390 Bluetooth 5.0 USB Adapter User Manual
To install the UGREEN Bluetooth 5.0 USB Adapter (CM390), you can either rely on Windows automatic detection or manually install the driver from the official site. While many Windows 10/11 systems support "Plug & Play" for this device, a manual driver is often required for Windows 7/8.1 or to unlock full functionality. Quick Setup Steps ugreen bluetooth 50 usb adapter cm390 driver install
Insert the Adapter: Plug the CM390 into a free USB port on your PC.
Wait for Detection: Check the lower-right corner of your taskbar for a Bluetooth icon.
Install Driver (If needed): If the icon doesn't appear, use the provided CD or download the driver from the UGREEN Download Center by searching for model "80889". Restart: Reboot your computer to finalize the installation. Detailed Installation Methods Method A: Automatic Installation (Plug & Play) Works best on Windows 11 and 10.
Windows should automatically find and install the Realtek Bluetooth drivers within seconds.
Confirm by opening Device Manager; the adapter should appear under "Bluetooth". Method B: Manual Driver Download (Model 80889)
If your system lacks a CD drive or automatic detection fails: Official Website: Go to ugreen.com/pages/download. Search: Enter the product SKU 80889.
Download & Run: Extract the .zip file, find setup.exe, and follow the InstallShield Wizard prompts. Finish: Click "Finish" and restart your PC. Troubleshooting & Tips Question about Ugreen CM390 - Galaxus
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."
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. Elena had been staring at the little silver
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.
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.
Installing the driver for your UGREEN CM390 Bluetooth 5.0 adapter Go to product viewer dialog for this item.
(Model 80889) is generally straightforward, as modern Windows systems often recognize it automatically. Quick Setup Guide
Preparation: If your computer has built-in Bluetooth, disable it first through Device Manager to avoid conflicts with the new adapter.
Plug in the Adapter: Insert the UGREEN USB dongle into an available USB port. On Windows 8.1, 10, or 11, the system may automatically install the driver within seconds.
Check for Success: Look for a Bluetooth icon in your system tray (lower right corner). If it appears, you're ready to pair devices. Manual Driver Installation
If the adapter isn't recognized automatically, follow these steps to install the official drivers: Option A: Using the Official Website Go to the UGREEN Download Center Search for product model " " (the part number for
Download the driver file corresponding to your operating system.
Extract the downloaded ZIP file, run setup.exe, and follow the on-screen prompts. Restart your computer once the installation finishes. Option B: Using the Included CD Insert the mini CD into your computer's disc drive.
Open the disc folder, locate setup.exe, and double-click to install. Troubleshooting Tips Disabled Built-in Bluetooth: If the UGREEN adapter
isn't working, ensure you haven't just turned off Bluetooth in settings, but actually disabled the hardware in Device Manager. UGREEN Bluetooth 5
Driver Update: If you see an "Unknown Device" in Device Manager, right-click it and select "Update Driver" -> "Search automatically for drivers".
Are you having trouble with a specific device (like headphones or a mouse) not connecting after the driver is installed? Question about Ugreen CM390 - Galaxus
To install the driver for your UGREEN Bluetooth 5.0 USB Adapter (Model: CM390)
, follow these steps to ensure a stable connection on Windows systems. 1. Pre-Installation (Crucial Step) Before plugging in the adapter, you must disable your computer's built-in Bluetooth (if it has one) to avoid driver conflicts. Device Manager on your PC.
Find "Bluetooth" in the list, right-click your internal Bluetooth adapter, and select Disable device device.report 2. Driver Installation Methods
You can install the driver using the physical media included with the product or by downloading it from the official site. Question about Ugreen CM390 - Galaxus
To install the driver for the UGREEN Bluetooth 5.0 USB Adapter (Model CM390 / Part Number 80889), you can use the included installation CD or download the latest version from the UGREEN official website. Installation Prerequisites
Operating Systems: Supported on Windows 7, 8.1, 10, and 11. It is not compatible with macOS or iOS.
Important Check: Before installing, disable any built-in Bluetooth on your computer via the Device Manager to avoid driver conflicts. Step-by-Step Driver Installation Method 1: Manual Download (Recommended) UGREEN 80889 Bluetooth 5.0 USS Adapter CM390
If you see a yellow triangle in Device Manager, here is the fix.
The installation method differs slightly between Windows 10 and Windows 11.
Yes. Once you understand the Realtek driver requirement, the UGreen CM390 is the best budget Bluetooth dongle on the market. The installation is frustrating only because Microsoft’s generic driver catalog is slow to update.
Pro Tip: After you get it working, use a free tool like Double Driver to back up the working Realtek driver. If you ever reinstall Windows, you can restore the driver in 10 seconds without an internet connection.
Still not working? It is rare, but you may have a defective unit. UGreen has a solid 18-month warranty. Return it, but there is a 99% chance that following the manual registry fixes above will resurrect your dongle.