Open (Right-click Start button > Device Manager). Look for "Bluetooth" or "Universal Serial Bus devices." If you see a yellow exclamation mark next to an unknown device, right-click and select Uninstall device .
Before diving into the driver download, it is essential to understand what the Jieli BR21 is. Manufactured by Zhuhai Jieli Technology, the BR21 is a highly integrated Bluetooth audio chip. It is commonly used in: jieli br21 driver link
Why specifically search for this driver? Unlike the chip (which uses Windows native drivers) or the Realtek RTL8761 (which requires a full Bluetooth stack), the Jieli BR21 is designed for low-latency audio bridges . Without the official driver, the device works in "listen-only" mode. With the correct driver, you get: Open (Right-click Start button > Device Manager)
: Try a different USB port (preferably a USB 2.0 port if you are having connection stability issues). Manufactured by Zhuhai Jieli Technology, the BR21 is
Because this driver is not digitally signed by Microsoft, Windows may block it.
: On some systems (like Linux/Ubuntu), a JieLi BR21 Bluetooth dongle may mistakenly show up as a storage device instead of a Bluetooth adapter. Technical Support & Official Resources