I have a $15 device that plugs into the 12v socket and broadcasts on a radio frequency. My phone can connect to that by Bluetooth. My radio can be controlled by

I have a $15 device that plugs into the 12v socket and broadcasts on a radio frequency. My phone can connect to that by Bluetooth. My radio can be controlled by physical buttons. The only thing the screen displays about the radio is the presets, which I can totally live without. I do not need an infotainment system. Heck, I don't even need as much as I have.