How to turn on "Car Amplifier" option on YT5760B head unit

S1, Please drop the menu setting, then you can find the option of Car Amplifier S2, When the color of the car amplifier changes to light blue, it means it has been successfully turned on. Please click "Car Amplifier" to turn on it. You can try to play music to test whether the head unit has sound S3, If you can't find the option of Car Amplifier, Please check your system version. And then take a photo to send ViaBecs to check #androidheadunit