I have one in the van, it connects to my phone over wireless android auto (would do the same if your apple inclined also) I have mine set up to output to bluetooth, which is paired to my factory head unit so all sound comes out of the speakers in the van as normal. My phone connects to the factory head unit for calls, but also connects to the display for media (not phone calls), and if i recall correctly, it also connects to the phone via WiFi which i assume does most of the data transfer. I have mine hard mounted/ wired (im not a fan of having wires dangling about) to an ignition live, so it turns on and off with the van. it is literally a 'set up and forget' solution for me