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: If it is a music transmitter model, look for a flashing LED on the physical dongle itself. Pairing must often be done with the hardware button on the device, as Windows will not show a Bluetooth menu for these specific chips. Ask Ubuntu Software & Update Tools
Some versions of Windows automatically assign the Microsoft USB CDC (Communications Device Class) driver to the BR21. While this driver is "verified" by Microsoft, it is often incomplete for Jieli’s proprietary commands. Users then attempt to force-install a Jieli .inf file, causing a signature failure. jieli br21 driver verified
This is normal for the BR21. It acts as a , not a Bluetooth radio. You pair your headphones to the dongle , not through the Windows Bluetooth menu. Low Volume / No Sound : If it is a music transmitter model,
: Often appears as a generic "USB Audio Device" or "JieLi BR21" in the Device Manager. Linux/Ubuntu : Identified via as "ID 4c4a:4155 Jieli Technology USB Composite Device". Verified ID/Hardware Hardware ID Examples While this driver is "verified" by Microsoft, it
You can verify it is working by checking under "Sound, video and game controllers". In sound settings, ensure the input and output devices are set to JieLi BR21 . Troubleshooting:
I can confirm this works with Ubuntu 22.04. Using at terminal lsusb lists as: "ID 4c4a:4155 Jieli Technology USB Composite Device" Ask Ubuntu Jieli BR21 Bluetooth dongle shown as storage device