The "story" of the Jieli BR21 driver link a common troubleshooting tale in the tech community, stemming from the fact that many affordable Bluetooth dongles and audio mixers (like those from Pyle or Borofone) use the JieLi AC690X series of chips The "Mystery Device" Problem
What operating system are you using (Windows 10, 11, Linux)? jieli br21 driver link
chip rather than a standard Bluetooth dongle that requires specific manufacturer drivers. Because it often identifies as a USB Composite Device USB Sound Card The "story" of the Jieli BR21 driver link
Want a guide on how to check if your device actually uses BR21 and how to access its hidden USB mode? jieli br21 driver link
To save yourself future headaches: