To help troubleshoot further, tell me your , your specific Ugreen model number , or the error message you see. Share public link

Works seamlessly with Bluetooth 5.0, 4.2, 4.0, and 3.0 devices. Downloading the UGREEN Bluetooth 5.3 Driver

Supports simultaneous connection of up to 5 devices (e.g., mouse, keyboard, printer, headset, phone).

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).

For models like the CM591 , which uses the ATS2851 chip , manual installation is often necessary.