The upgrade kit is for the 6.86inch steering wheel display screen which don`t with the Carplay/ Android Auto function and touch screen function.
Circuit board: Carplay/Android Auto Fuction. if just replace the Circuit board it will support carplay/ Android Auto function, but not support touch screen function.
Circuit board & Touch Screen: Carplay/Android Auto Fuction and Touch Screen function.
Installation manual:
https://drive.google.com/file/d/1mP8e1JbmglrGkIzdm944yoOwBf2LoMOZ/view?usp=sharing
Shipping time: 10-15 days after place the order