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
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 . jieli br21 driver verified
Knowing your specific hardware setup will help in providing the exact pairing sequence. This is normal for the BR21
Jieli BR21 Driver: Verified Solutions and Installation Guide Low Volume / No Sound For firmware updates
Check and ensure "JieLi BR21" is set as both the Default Output and Default Input device. Official Resources
Try a different USB port. Some Jieli chips are sensitive to USB 3.0 interference; use a USB 2.0 port if available.