Jieli_USB_Driver_v3.2.1.zip or JL_Driver_Setup.exe .
This is where most users encounter the AC4100. If you are reading this, you likely bought a cheap USB Bluetooth dongle online, plugged it in, and found that while it pairs with your headphones, the audio sounds static-filled, the microphone doesn't work, or the connection drops constantly. Jieli Ac4100 Bluetooth Driver
Often found in car Bluetooth-to-USB adapters, wireless headsets, and generic USB Bluetooth 4.0/5.0 receivers. Jieli_USB_Driver_v3
If the device is not recognized, users must download the specific driver package from manufacturer support sites or third-party repositories like Driver Scape DriverIdentifier Common Issues: plugged it in