Jieli Br21 | Driver

It is worth noting that many modern devices utilizing the Jieli BR21 chip no longer rely on your PC's native Bluetooth. Instead, they come with a small USB Bluetooth transmitter (

Since Jieli does not release standalone "driver installers" for consumers, you must rely on Windows Update. Jieli Br21 Driver

Even after installation, problems arise. Here is how to fix them. It is worth noting that many modern devices

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. Here is how to fix them

| IC | BT Version | Built-in Amp | Charger | Codec Support | Typical Use | |----|------------|--------------|---------|---------------|--------------| | Jieli BR21 | 5.0 | 2.5W mono | Yes | SBC | Ultra-low-cost mono speakers | | CSR8635 | 4.2 | No | No | SBC, aptX | Higher-quality stereo designs | | AC6925 (Jieli) | 5.0 | 5W+5W | Yes | SBC, MP3 | Low-cost stereo speakers | | ESP32 + I2S | 4.2/5.0 | No | No | SBC, AAC, LDAC (software) | Programmable IoT audio |

Some packages include Setup.exe.

Often, Microsoft includes these third-party Bluetooth drivers in its cumulative updates.