While factory car audio systems are better than they’ve ever been before, car stereo installers and enthusiasts aren’t going anywhere. Because factory is never enough: You need more.

plus buttons and dials for playing or pausing music, taking calls and adjusting the volume. All have a simple display for showing the FM frequency being used, so you can tune your car radio ...

A simple Bluetooth module designed for wiring into car audio systems ... and the auxiliary audio can play through on top of the silent output from the CD itself. However, it’s an inelegant ...