Once connected, follow these steps for a installation:
It's USB sound card. Bluetooth inside is only for receiving audio stream from something like PC or smartphone and playing. Ask Ubuntu jieli br21 driver verified
For advanced hardware maintenance, JieLi provides specific update tools for their Bluetooth chips, though these are typically intended for developers or firmware flashing: Jieli USB Dongle 4.0 Update Tool : Used for upgrading DV/BR series chips, including BT_Config_Tools Once connected, follow these steps for a installation:
Avoid any site that asks you to run a .exe driver installer without showing a digital signature. The verified driver is usually delivered as a .zip containing .inf , .sys , and .cat files. The verified driver is usually delivered as a
USB device detected. Loading jieli_br21 module... Firmware handshake OK. Audio interface registered.
Be patient; it can take a moment for the OS to enumerate the device.