小喇叭工作条件：
Small speaker working conditions:
1,设置主页面中导航APP路径(工厂设置》APP路径》导航)；
1, set the navigation APP path in the main page;

2,打开原车收音机，播放FM；
2, open the original car radio, play FM;

3,强行切换显示到安卓界面，打开主页面导航APP；
3, forcibly switch display to the Android interface, open the main page navigation APP

4,小喇叭播放导航提示音。
4, the small speaker plays the navigation sound.