The default launcher is "Car Launcher" (various themes: 1024x600 UI3, UI4, or UI5). It includes widgets for speed (GPS), radio, and music.
You might see similar versions like the YT9216B or YT9217, but the "BJ" suffix often denotes specific radio or screen driver configurations. 2. Essential Performance Tweaks android yt9216bj-00012-v001