For firmware updates or technical datasheets, the official manufacturer is You can find their technical repositories and update tools on the Jieli-Tech GitHub or through authorized distributors like Axtekic Support .
Getting your device to work can be frustrating because it often doesn't appear as a standard Bluetooth dongle. Many users find it recognized as a "USB Composite Device" or even a "USB Sound Card" rather than a communication adapter. This is because the BR21 is often a USB-to-Bluetooth audio bridge , designed primarily to transmit or receive audio streams rather than act as a generic Bluetooth radio for peripherals like mice or keyboards. Quick Fix: Does it actually need a driver? jieli br21 driver verified
The device often shows up in systems as ID 4c4a:4155 Jieli Technology USB Composite Device . For firmware updates or technical datasheets, the official
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 This is because the BR21 is often a
Windows typically uses the Generic USB Audio Driver for Jieli chips. Plug the device into a USB 2.0 or 3.0 port. Open (Right-click Start > Device Manager).