Ensure the adapter is plugged directly into a USB 2.0 port, not a hub.
Depending on your specific model and Windows version, you may need to install drivers manually or rely on plug-and-play functionality. driver ugreen bluetooth 53
The mini-size design allows it to be left plugged into a laptop or PC without blocking adjacent USB ports. Troubleshooting Ensure the adapter is plugged directly into a USB 2
The UGreen adapter's driver is what exposes the Isochronous Channels (ISO) to the OS. If the driver is generic, those channels are blocked. A proper UGreen driver package includes an updated BthLEEnum.sys extension that reports LMP version 12 (Bluetooth 5.3) instead of LMP version 9 (5.0). driver ugreen bluetooth 53