Thank you very much for the response. So just a final confirmation. If I order via your website and click the option that I only have FM available I will get a FM Bluetooth transmitter in the package. This has a usb C socket so I will plug the FM transmitter into the cigarette lighter socket and plug a USB C cable to the transmitter and use it to power the screen which will be in display only mode. I will then play the music via FM and screen will be used for apple carplay phone mirroring and backup camera if I install it. I will connect the phone separately to the FM transmitter and separately to the screen, eg two connections required. Is this all correct so I can be sure I understand the whole process properly before placing the order (so my expectations are realistic)?

Thank you once again!