?1 Year Warranty & Install Help?Don't hurt your original car wires. Not affect your factory car warranty.If you don't have the confidence to install it, plz find a specialist to help out.Any issue please get help from us, We are more professional than auto repair shop.Please do not finalize install until you have tested every function on your car. ?Control Method?:After install our wireless carplay car radio screen,it can keep original car knob and steering wheel button control,such as volume + -, previous song and next song. ?Add More Functions?:Wireless Carplay, Wireless Android Auto, Wireless mirrorlink for ios and android phone, bluetooth, EQ adjustable with best audio quality, Support original factory camera and aftermarket reverse camera. Synchronization of light-sensitive functions to the original headlamps, when you turn on the original headlamps, the screen turns on night mode automatically, when you turn off the original headlamps, the screen will become to day mode. ?Pre-shopping Notes?: Road Top 10.25 inch Car Stereo Receiver only fit for BMW 3 Series F30/F31/F34/F80 2012-2015 Year with NBT System, Please check our website picture to make sure firstly. If you feel confused about it, please contact with us via email firstly. ?10.25 Inch Carplay Car Stereo for BMW 3 Series with NBT?:In 2023, Road Top bring a new technology, it is to replace original car screen with Linux System 10.25 inch 1920*720 resolution car touchscreen, not only keep the original OEM system, but also add wireless Carplay,wireless Android Auto and wireless mirrorlink Functions.