11. Radio, Fm radio: support FM1, FM2, FM3 three bands, up to 18 radio stations can be stored. 22. Read U disk. (audio/video/picture) 33. Aux In function, press the Mode button to switch the machine to Aux In mode. When the phone is playing music, use the Aux audio cable to plug in both ends to play the phone music. 44. Bluetooth function, turn on the mobile phone to search for Car?Bt with Bluetooth, click to connect after searching, enter 0000, and some can be used without a password. Press the Mode button to switch to the Bt interface, and then open the mobile player to play music, you can play mobile music. 55. Rca audio output can be connected to a subwoofer. 66. Reversing rear view function. (Camera optional) 77. Video input. 88. The original car steering wheel learning function. 99. Compatible for Android recorder can be installed. 1010. Wifi internet access. 1111. Gps navigation. 1212. Mobile phone interconnection. (Compatible for Android) 1313. App can be installed. 1414. Rds function, can receive traffic radio stations in real time.