Generic Microsoft drivers allow you to hear audio (Playback), but they usually disable the microphone (Recording) or create a severe quality drop (switching to "Hands-Free AG Audio" with 8kHz mono sound).
The JLieLi BR21 Full Driver suite solves three specific problems:
If you're still having trouble, consider the following:
JieLi BR21 (often recognized by systems as part of the BR17 or AC690X family) is a low-cost Bluetooth audio transmitter/receiver chip primarily used in USB dongles and wireless audio modules. Because it is designed as a "driverless" composite device, installation issues often stem from how the OS categorizes the device rather than a missing ".exe" installer. 1. Hardware Identification
Before troubleshooting, confirm your device is a JieLi BR21. Hardware ID : Typically appears as USB\VID_4C4A&PID_4155 Device Manager Name : May show as "JieLi Technology USB Composite Device" "PC-T7 JieLi BR17" Architecture : It is based on the AC690X series
(specifically the AC6905A 24-pin chip), an all-in-one Bluetooth audio solution. 2. Driver Installation & Modes
The BR21 is a plug-and-play (PnP) device that uses standard Windows/Linux/macOS USB audio and HID drivers. No proprietary external driver is typically required. Storage vs. Audio Mode
: Some BR21 dongles may initially appear as a "Removable Storage" device (containing a manual or driver link). If it stays in storage mode, it may not function as a Bluetooth adapter. Firmware Updates : For developers or those with a malfunctioning unit, the Jieli USB Dongle 4.0 Update Tool is used to flash or configure the chip via its DP/DM pins. 3. Setup and Pairing Guide If the device is recognized but not pairing: Plug-in Wait Time
: The chip can take up to 30 seconds to be fully recognized by the OS. Pairing Mode Indicator
: Once recognized, the blue LED on the dongle should flash rapidly, indicating it is searching for a receiver (like Bluetooth headphones). Automatic Pairing
: Unlike standard PC Bluetooth adapters, the BR21 often manages the pairing itself at the hardware level. Put your headphones into pairing mode and place them near the dongle; they should pair automatically without an OS prompt. Ask Ubuntu 4. Troubleshooting Common Issues Not Recognized in OS
: If you see "No visual indication" in your OS settings (like Ubuntu or Windows Sound settings), check if it appears in the command (Linux) or Device Manager (Windows) under "Universal Serial Bus controllers". Serial Communication
: If using it for development, the chip supports serial communication (UART). Setting the baud rate to 1 enables full-duplex mode, while 2 enables single-wire mode. Ask Ubuntu For developers looking for deeper integration, the christian-kramer/JieLi-AC690X-Familiarization GitHub
provides documentation on the chip's internal architecture and programming. Are you trying to use this dongle for standard audio listening , or are you attempting to reprogram the chip for a custom project? christian-kramer/JieLi-AC690X-Familiarization - GitHub jieli br21 driver full
The Jieli BR21 (also associated with Zhuhai Jieli Technology) is primarily a Bluetooth audio receiver and controller often found in USB dongles, car adapters, and Bluetooth mixers. It is frequently identified by the hardware ID VID: e5b7, PID: 0811. Driver Summary
Operating System Compatibility: The device typically uses standard USB Audio Class and HID drivers built into Windows 10/11 and Linux (kernel 5.x+), meaning no third-party "full" driver installation is usually required.
Device Identification: In many cases, Windows will list it as a "JieLi BR21 Stereo" or simply a "USB Composite Device".
Update Tools: For firmware-level modifications, Jieli provides the JL USB Dongle 4.0 Update Tool, used by manufacturers to upgrade chips like the BR17, BR21, and BR22. Technical Specifications Feature Chip Type 32-bit DSP Bluetooth Audio IC Bluetooth Version Compliant with Bluetooth V5.0+BR+EDR Audio Interface 16-bit Stereo DAC with headphone amp, SNR ≥is greater than or equal to 95dB Connectivity USB 2.0 OTG controller, UART, SPI, and IIC support USB Enum
Frequently appears as a USB Sound Card rather than a standard Bluetooth dongle. Common Troubleshooting
Shown as Storage Device: Some BR21 dongles mistakenly mount as a CD-ROM/Storage device to provide manuals or drivers. To fix this on Linux, use usb_modeswitch with the specific vendor/product ID.
Missing Bluetooth Button: If Windows sees the device as an "Audio Device" but does not show the Bluetooth toggle, it is because the chip is handling the Bluetooth connection internally (acting as a wireless bridge) and presenting only the final audio stream to the PC.
Pairing Issues: Ensure the device is in pairing mode (often indicated by a flashing blue LED). Some mixers require a physical "ST/USB" or "PC" button to be toggled to activate the Jieli interface. Driver Resources
Official Downloads: Direct "full" driver packages from Zhuhai Jieli are rarely provided to end-users as they are intended for OEMs.
Automated Updates: Use the Windows Device Manager to search for "Generic Bluetooth" or "USB Audio" updates if the device is not functioning.
OEM Drivers: If you have a specific brand (e.g., Borofone), check the Borofone Support page for localized firmware or drivers. Jieli BR21 Bluetooth dongle shown as storage device
JieLi BR21 refers to a Bluetooth audio interface often found in budget-friendly USB sound cards, mixing consoles, and audio transmitters. It is typically recognized by modern operating systems like Windows 10/11 and Linux (Ubuntu) as a generic USB Composite Device USB Audio Device
, meaning it usually does not require a manual driver installation to function. Key Features of JieLi BR21 Integration Plug-and-Play Compatibility Generic Microsoft drivers allow you to hear audio
: Automatically identified as an audio input/output device. Users can select it by clicking the speaker icon in the taskbar and choosing "JieLi BR21" as the default device. Dual-Purpose Hardware
: Often acts as a bridge between professional audio equipment (like mixers) and a PC, enabling high-quality recording and live streaming via USB lossless transmission. Integrated Bluetooth Support
: Supports wireless audio streaming from smartphones or tablets directly to the device for mixing or playback. Standard Profiles : Typically supports standard Bluetooth profiles such as (audio streaming) and
(hands-free/headset), though specific capabilities can vary by the host device (e.g., BR17 vs BR21 versions). Common Use Cases Recording & Live Streaming : Connecting a mixing console
to a computer to capture audio for podcasts or music production. Bluetooth Transmitters
: Using the chip in a dongle to add Bluetooth functionality to a non-Bluetooth PC. Third-Party Drivers : For advanced low-latency needs, some users utilize the ASIO4ALL driver
to manage audio routing and reduce lag in digital audio workstations (DAWs). download link for a specific operating system, or are you trying to troubleshoot a connection issue? Jieli BR21 Bluetooth dongle shown as storage device
Finding specific drivers for Jieli (Zhuhai Jieli Technology) devices can be difficult because they are often white-label chips used in generic Bluetooth adapters or audio devices. Device Identification
The "BR21" (or similar BR17, BR23) is often recognized by Windows or Linux as an Audio Device or a USB Mass Storage device rather than a generic Bluetooth dongle. This is because the chip is primarily designed for receiving and playing audio streams. Driver and Solution Steps
If your device is showing up as a storage device or failing to pair, try these steps:
Standard Bluetooth Stack: In most cases, you do not need a specific "Jieli" driver. Ensure your system's default Bluetooth drivers are active. For Windows 10/11, let the Microsoft Update catalog attempt to identify it automatically.
Fixing "Storage Device" Mode: If the dongle appears as a disk drive, it may be stuck in a "mode-switch" state.
Linux: Users have successfully used usb_modeswitch to force the device into the correct mode using commands like sudo usb_modeswitch -v 0xe5b7 -p 0x0811 -W. JieLi BR21 (often recognized by systems as part
Third-Party Files: Some community-hosted files exist on platforms like Google Drive, but use extreme caution with executable files from unofficial sources.
Manufacturer Support: For firmware updates or specialized "Burning" tools, check professional electronics support sites like Axtek IC, which hosts manuals for Jieli update tools. Jieli BR21 Bluetooth dongle shown as storage device
JieLi BR21 is a specialized Bluetooth-to-USB bridge chipset manufactured by ZhuHai Jieli Technology Co., Ltd
. It is commonly used in low-cost Bluetooth audio receivers, transmitters, and USB sound cards rather than being a standard "Bluetooth dongle" that provides a full Bluetooth stack to a PC. Ask Ubuntu Driver Overview
For most modern operating systems, the JieLi BR21 is designed to be driverless (Plug-and-Play). Ask Ubuntu Functionality: It typically presents itself to the operating system as a USB Composite Device USB Audio Device
. Because it uses standard USB audio and HID classes, it utilizes the generic drivers built into Windows and Linux. Operating Systems:
It is compatible with Windows 7, 8, 10, and 11, as well as Linux distributions like Ubuntu. Ask Ubuntu Common Identification & Behavior
If you are troubleshooting the device, it often appears in Device Manager under these names: USB Composite Device JieLi BR21 (or JieLi BR17, which uses similar firmware) BR21 UBOOT1.00 (when in a specific bootloader or "update" mode) USB Audio Device Troubleshooting & Configuration
If your PC is not recognizing the device as a Bluetooth adapter, keep the following in mind: Jieli BR21 Bluetooth dongle shown as storage device
The difference between a frustrating Bluetooth experience and a flawless one is the jieli br21 driver full installation. By following the comprehensive guide above—disabling signature enforcement, removing ghost devices, and configuring Windows power settings—you can restore high-quality stereo playback and crystal-clear microphone input.
If you continue to experience issues, your Bluetooth adapter may be the bottleneck. USB Bluetooth 5.0 dongles (Chipset: Realtek RTL8761B) are the best companions for the BR21 chipset.
Last Updated: October 2024. Compatible with Windows 11 23H2 and Windows 10 22H2.
Note: The JLieLi BR21 driver is provided as-is by various OEMs. Always scan downloaded executables with Windows Defender before installation.