If the device connects for a second and then disappears, the BR21 is likely failing to enter Upgrade Mode. Ensure the device is powered off before plugging it in, and verify the button combination used to trigger the flash mode.
If your Windows 10/11 system recognizes the dongle but you don't see a "Bluetooth" icon, this is normal for many Jieli transmitter-only dongles. They act as a , not a controller that connects to files, mice, and keyboards. 2. No Sound After Pairing If paired but no sound exists: Go to Sound Settings (right-click the speaker icon). jieli br21 driver free
Avoid websites that claim to offer a standalone "Jieli BR21 Driver Installer exe" behind a paywall or bundle it with aggressive advertising. The authentic, free drivers are distributed inside Jieli’s official SDK development utilities and flashing tools. If the device connects for a second and
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 They act as a , not a controller