1. Bluetooth hands-free call USB with charging function 2. Echo cancellation and noise processing during phone calls 3. Stereo Bluetooth and FM transmission technology 4. Support USB/TF card/Bluetooth function 5. Support MP3/WAV format music 6. Automatic power off memory function 7. Power supply of cigarette lighter: DC12V-24V voltage power supply 8. Bluetooth version 5.0 FM Transmission frequency: 87.5 ~108Mhz 9. Voltage detection 10. Colorful atmosphere lights
