The BR21 is a product of Zhuhai JieLi Technology, a Chinese semiconductor company. JieLi is known for designing highly integrated, low-cost system-on-a-chip (SoC) solutions that are remarkably widespread in budget-friendly consumer electronics, from wireless speakers and headphones to car kits. The BR21 is a reference to one of their silicon designs or firmware configurations, often found in small, low-profile USB dongles and audio modules like the MH-M38.
Without the proper driver, your computer will fail to recognize the device. This results in: Bluetooth toggles not appearing in your settings.
I can confirm this works with Ubuntu 22.04. Using at terminal lsusb lists as: "ID 4c4a:4155 Jieli Technology USB Composite Device" Ask Ubuntu Jieli Br21 Driver
The Br21 was equipped with state-of-the-art AI, sensors, and cameras, making it virtually indestructible. However, Jieli soon realized that the vehicle's true strength lay not in its technology, but in its ability to adapt to unpredictable situations.
The is an excellent choice for ultra-cost-sensitive, mono Bluetooth speaker products where simplicity and battery life matter more than high-fidelity audio. It lowers the barrier to entry for Bluetooth audio design by integrating nearly everything except the battery, speaker, and a handful of passives. The BR21 is a product of Zhuhai JieLi
Corrupted existing Bluetooth stack. The Fix: You may need to completely reinstall your PC's main Bluetooth adapter driver (Intel, Realtek, etc.) before the Jieli BR21 peripheral driver can successfully attach to it.
To understand the BR21's place in the market, it is helpful to compare it to its primary competitor: CSR (Cambridge Silicon Radio, now part of Qualcomm). Without the proper driver, your computer will fail
One complaint about older JLieLi chips was the audible hiss during silent passages. The BR21 seems to have addressed this. With proper PCB layout, the noise floor sits around -85dBV, which is perfectly acceptable for mid-range portable speakers.
Many of these websites bundle malware, adware, or unwanted system optimizers into their installers. Never download an .exe file from an untrusted source. Stick to Windows Device Manager manual updates, the Microsoft Update Catalog, or the setup disc/website provided by the actual brand name printed on your device's packaging.
Some packages include Setup.exe .
