【Apple Carplay and Android Auto】The portable apple carplay supports wireless carplay and Android AUTO. The portable car radio can answer/dial calls, navigate/play music, call voice assistants, etc. after entering carplay or Android AUTO with a USB cable link. To use Android AUTO you need to download the app on your phone in advance. 【Bluetooth/FM/AUX】The portable car play can take calls using Bluetooth and is equipped with an external microphone to provide you with a better calling environment. It can also be used to play music etc. using Bluetooth. Turn on the FM interface of the portable apple car play and tune the portable radio and the car's own radio to the same channel to transmit the audio. You can also use an AUX cable to link the portable car stereo to the car's own radio to transmit audio.