If your system does not automatically detect the adapter, or if you are using an older Windows version, you can install the driver manually:
Works with Bluetooth mice, keyboards, printers, headphones, and speakers. ugreen bluetooth 5.0 usb adapter cm390 driver
If you need to manually install the driver or want to ensure you have the most up-to-date version, it's best to download it directly from UGREEN's official website. If your system does not automatically detect the
This is the most confusing part for new users. Here is the truth: ugreen bluetooth 5.0 usb adapter cm390 driver
To recap: