If you are using Linux, the issue is partially resolved. Ensure your kernel is updated to version 6.12-rc3 or later to include the official fix. This patch stops the device from being incorrectly mounted as a storage drive.
: Windows cannot find drivers for the device, or installation fails with an error.
If you are working with JieLi audio chips and hitting a wall with the BR21, hit me up—happy to share the working configuration. Development moves fast, but sometimes the old drivers are the only ones that work! 💻🔧
: The system typically identifies the device as a "Jieli BR21" audio device automatically. If it is not recognized, you may need a generic Bluetooth or audio driver, such as those found on DriverIdentifier for brands like Borofone. jieli br21 driver verified
Windows should automatically detect and bind the device to the Microsoft-signed UAC driver.
often appears as ID 4c4a:4155 Jieli Technology USB Composite Device . It generally works out-of-the-box with kernel 5.x or higher, appearing in KDE or GNOME sound settings.
In the world of consumer electronics, few components are as ubiquitous yet as misunderstood as the audio chips manufactured by . If you own a pair of budget-friendly wireless headphones, a portable Bluetooth speaker, or a children’s audio learning pen, chances are high that it runs on a Jieli chip—specifically the Jieli BR21 (often referred to as the AC6921 or AD6973 series in SDKs). If you are using Linux, the issue is partially resolved
USB Bluetooth dongles (often advertised as Bluetooth 4.0, 5.0, or 5.3) Budget Bluetooth headphones and earbuds Portable wireless speakers and soundbars Wireless FM transmitters for cars Cheap USB sound cards
: When a Jieli AC690X or AC695X series chip is triggered into firmware update or Device Firmware Upgrade (DFU) mode, it drops its standard operating profile and enumerates to the PC as a raw USB mass storage or composite programming target labeled BR21 UBOOT .
A common issue occurs when the OS incorrectly locks the device into storage mode instead of loading the Bluetooth driver . How to Install and Verify the Jieli BR21 Driver on Windows : Windows cannot find drivers for the device,
Jieli BR21 Driver Verified: Solving Bluetooth Audio Issues (2026 Updated Guide)
Disclaimer: This guide provides information based on publicly available resources and user experiences. Driver availability and device compatibility may vary by manufacturer and device revision. Always verify driver sources for security and authenticity before installation.
The is a low-cost, all-in-one Bluetooth and USB audio chipset manufactured by Zhuhai JieLi Technology (often abbreviated as JL). These chips are widespread in low-cost Bluetooth audio modules, USB audio interfaces, and external sound cards from Chinese manufacturers.
No, it's an audio-only device. It cannot be used for mice, keyboards, or file transfers.