Finding a specific "JieLi BR21 driver link" is often complicated because JieLi (Zhuhai Jieli Technology) is a chipset manufacturer that provides chips to third-party brands rather than a consumer hardware company that hosts direct driver downloads. Direct Driver Sources
To help you find the exact link you need, could you tell me: What kind of device is it (USB dongle, headset, etc.)? jieli br21 driver link
Many BR21 devices are "transmitters" only. They appear as an Audio Device, not a Bluetooth radio. Check your Sound Settings for "Jieli BR21". Shown as Storage Finding a specific "JieLi BR21 driver link" is
Update Tools: For firmware-level issues or specialized "update mode" access, refer to the Jieli USB Dongle Update Tool Manual. USB Bluetooth 5
In Device Manager, right-click your device and select Update Driver.