To set up your UGREEN CM390 Bluetooth 5.0 USB Adapter Go to product viewer dialog for this item.
UGREEN Bluetooth 5.0 USB Adapter (Model CM390 / Part Number 80889)
Once the driver is installed, you should see a Bluetooth icon in your system tray.
| Problem | Solution | |--------|----------| | Adapter not detected at all | Try a different USB port. Avoid USB hubs. | | Bluetooth on/off toggle is missing | Uninstall the device in Device Manager, unplug, restart PC, then plug back in. | | Pairing fails or devices disconnect | Remove old Bluetooth drivers (from other dongles) first. Then install CM390 drivers fresh. | | Works in Windows but not in Linux | Install firmware-realtek as shown above. |
: Visit the UGREEN Download Center and search for model 80889 .
Corrupt driver installation or conflict with another Bluetooth stack (e.g., Intel or Toshiba stack). Solution:
The , also identified by the model number 80889 , is a compact dongle designed to provide wireless connectivity for PCs and laptops. While it is generally "plug-and-play" on modern systems, certain setups require a specific driver to enable full functionality. Driver Installation Guide