1. Open the audio setting menu of the lathe. Different car models may have slightly different settings, but generally you can find the "audio" or "settings" options on the owner's interface.
2. In the audio setting menu, find the "sound source" option and click Enter.
3. In the "Audio Source" menu, you can see various audio source options, such as FM, AM, AUX, USB and Bluetooth. Select the appropriate audio source option as needed.
4. To use the Bluetooth audio source, you need to pair it first, and then connect the mobile phone or other Bluetooth devices to the car.