Feature 1. radio 2. U disk SD card (audio/video/pictures) 3. Bluetooth function 4. RCA audio output can be connected to a subwoofer 5. Rear view function when reversing 6. AUX input function 7. Video input function 8. Original car steering wheel learning function 9. Mobile phone interconnection Android AUTO/Apple Car. Play 10. Colorful lighting function 11. Rear USB function 12. USB charging port 13. Power supply reverse polarity protection function 14. External wheat head function. Specifications 1. System: Quanzhi melis system 2. Software solution: F133 3. Radio frequency: FM 87.5~108.0MHz 4. Radio IC: QN8035 5. Power amplifier IC: CD7388CZ 6. Output power: 60. Wx 4 7. Working voltage: 12~14.4V 8. Working temperature: -10~60 degrees Celsius 9. Bluetooth version: version 5.1 (default name: Carkit) 10. Display resolution: 800x 480 11. Screen size: 4-inch resistive touch screen 12. Front and rear USB: 2 front USB interfaces (one charging and one USB 2.0 reading) + 1 rear USB 2.0 reading 13. RCA parameters: Audio output: 2 channels (left channel + right channel) Video output: 2 channels Audio input: Front AUX input Video input: 1 channel Reversing video input: 1 channel 14. Audio format: MP3/AAC/APE/OGG/M4A/RA/WAV 15. Video format: H263/H264/H265/DIVX HD(720P 1080I 1080P)AVI/FLV/MKV/MPEG/MP4/WMV9/VC/ASF/TS/QT 16. Image format: JPEG/PNG/BMP/GIF/TIFF 17. Languages: English, Chinese, Spanish, Portuguese, Russian, German, French, Polish, Turkish, Arabic, Hebrew, Italian, Czech, Japanese (less languages require software update)