For BMW Series3 4 F30 F31 F34 F32 F33 upgrade Apple CarPlay & Android auto Head unit

Compatible Models: BMW 3 Series F30 F31 F34 2012-2017 NBT system BMW 4 Series F32 F33 F36 2012-2017 NBT system BMW M3 F80 2012-2017 NBT system BMW M4 F82 2012-2017 NBT system User manual for BMW Linux Screen_V1.1： Download   How does it work? While the unit (CarPlay Head unit) is inactive, the original video signal is passed unchanged, and your car works as before.After activating the CarPlay Head unit, the CarPlay unit video signal is shown on the display instead.When you reverse the car while using the CarPlay system, the system will automatically switch to the camera without manual operation.You can easily switch system back and forth between the unit and your original head unit.(TIPS: Press and hold the “Menu” key to switch the system) Features: This is a multimedia touch screen with built-in compatibility with Apple CarPlay and Google Android auto. It will replace your OEM screen and add the following features to your car: Apple CarPlay (wired and wireless) Android Auto (