There are two ways to set the car mode of Apple Bluetooth, one is to connect directly with USB, that is, as long as you plug in USB; The second is Bluetooth connection, that is, to find the Settings inside the phone, click on it, find the Bluetooth inside and open it, and then open the car Bluetooth function and search the phone Bluetooth Settings set to be visible to all, and the opened phone Bluetooth can be paired with the Bluetooth of the car navigation system. But a direct USB connection doesn't work with iphones. After the Bluetooth of the mobile phone can be paired with the Bluetooth of the car navigation system, you can use the car Bluetooth to make and receive calls and enjoy music on the car Bluetooth device.