1. How to turn on the button light?

There are two way to turn on the button light:
1)  Turn off the ILL detection, the button light will be on all the time. (do not suggest this way since the screen will not dim when you turn on car’s headlight)
For S series following: Car Settings-General-Headlight detection-off
For HC series following: Car Settings-General-Illumine Detect-off.
2)  Leave the ILL detection on, and connect the G4 (ILL orange wire) to car’s headlight positive. In this way the button light will turn on and the screen will dim when you turn on your car’s headlight.
Cars with CANBUS system may control the button light via CANBUS decoder, so you must connect CANBUS decoder to power cable and connect the 8pin plug to our player.

2. How to adjust the button light color?

No all the player have multicolor button, please refer to the products parameter table in our product description.
For S series following: Car Settings-General-Colorful Light Picker
For HC series following: Car Settings-Display-illumination color-LED Animation-off.