A common issue with Jieli BR21 USB dongles is that they appear as a small USB storage device rather than a Bluetooth radio. This happens because the chip thinks it's in "firmware update mode".
Look for driver architectures matching your system (x64 or x86). jieli br21 driver link
A: Insert the BR21 dongle into a USB 2.0 port (not USB 3.0, as some BR21 chips have compatibility issues with blue ports). Then run the installer again. A common issue with Jieli BR21 USB dongles
Go back to Device Manager. Expand . You should see "Jieli BR21 Audio" or "Jieli USB Audio." Expand Universal Serial Bus devices . You should see "Jieli BR21 Composite Device." A: Insert the BR21 dongle into a USB 2
This chip is highly versatile and is used as the core component in many budget-friendly Bluetooth-enabled devices. Here are the most common forms you'll encounter it in: