There are two common scenarios:
Before diving into drivers, let's understand the hardware. The Jieli BR21 is a highly integrated Bluetooth 5.0 (and sometimes 5.1/5.2) audio and data transmission chip. It is manufactured by Zhuhai Jieli Technology, a major player in low-cost, high-performance wireless audio solutions.
You will find the BR21 chip inside:
Because the BR21 is a USB bridge chip (it converts Bluetooth signals to USB audio protocols), your computer sees it as a standard audio device—not a proprietary piece of hardware.
Summary: The JieLi BR21 driver is a standard USB-to-Serial driver used for flashing. It is free but usually found in developer SDKs rather than a standard download page. Always install it manually via Device Manager for the best results.
The Jieli BR21 driver is a essential component for users of Jieli Technology’s Bluetooth audio adapters, USB sound cards, and mixers. While these devices are often marketed as Bluetooth dongles, many systems identify them as USB Composite Devices or USB Sound Cards, which require specific drivers to enable high-fidelity audio transmission and receiving capabilities. Why You Need the Jieli BR21 Driver
Most Jieli chips are designed to bridge the gap between digital USB signals and wireless Bluetooth audio. Without the proper driver, your Windows PC might recognize the device only as a generic storage unit or fail to show the Bluetooth "pair" button altogether. Installing the driver ensures: jieli br21 driver free
Hi-Fi Audio Output: Unlocks noise reduction and high-quality sound processing built into the Jieli chipset.
Full Bluetooth Functionality: Enables the device to switch from a "storage" mode to a pairing mode, indicated by a flashing blue LED.
System Compatibility: Fixes "sound not working" errors on Windows 10 and 11 by providing the correct hardware ID mapping. Where to Download Jieli BR21 Driver for Free
Because Jieli is a chipset manufacturer, drivers are often bundled by third-party device makers (like Borofone or various "no-name" mixer brands). You can find free downloads on these trusted driver repositories:
DriverDouble: Offers a setup package (v4.2.8) compatible with Windows XP through Windows 10.
DriverIdentifier: A reliable source for scanning your specific hardware ID and matching it with the correct Jieli or Borofone BR21 stereo driver. There are two common scenarios: Before diving into
Driver Scape: Provides general Bluetooth device drivers that often support Jieli-based hardware for Windows 10 and 11 (64-bit). How to Install the Driver
The JieLi BR21 (and its relative BR17) is often misidentified by modern operating systems as a USB Sound Card or storage device rather than a standard Bluetooth dongle. This is because the chip is primarily designed as a "Music Transmitter" rather than a generic Bluetooth adapter. Driver & Recognition Guide
Because these chips use standard USB audio/HID classes, a specific "JieLi" driver is rarely required for basic playback. Instead, you must ensure the OS treats it as the correct device type. Windows 10/11:
The device often appears in Device Manager as an "Audio Device" rather than having a "Bluetooth" button in settings.
If it is not recognized, search for generic Borofone BR21 Stereo drivers or generic Bluetooth audio drivers on sites like DriverIdentifier.
Tip: If seen as a storage device, try unplugging and re-plugging it to trigger the "Audio" mode. Linux (Ubuntu/Debian): Because the BR21 is a USB bridge chip
It may be listed in the terminal (via lsusb) as "Jieli Technology USB Composite Device".
If it fails to switch from storage mode to Bluetooth mode, you can force it using usb_modeswitch with the following command:sudo usb_modeswitch -v 0xe5b7 -p 0x0811 -W. Hardware Developers:
For chip-level programming or upgrading, use the Jieli USB Dongle 4.0 Update Tool.
The chip may identify as BR21 UBOOT1.00 when in developer mode. Troubleshooting Connectivity
Pairing Mode: Once recognized, the blue LED on the dongle should flash quickly. Put your headphones/speakers into pairing mode nearby; the dongle usually pairs automatically without a software interface.
No "Bluetooth" Icon: On Windows, you might not see the standard Bluetooth toggle. Instead, look for it under Sound Settings as a playback device.
JTAG/Update Errors: If using the AXTEK Update Tool, ensure the DIP switches are set correctly for the BR21 (usually the lower four bits remained unswitched for standard USBkey sending). christian-kramer/JieLi-AC690X-Familiarization - GitHub