1Multifunctional Design: MP3 player for car use, with both QC3.0 fast charging and transmitter car charging functions, can achieve an integrated solution to multiple needs. 2High Speed Charging: The MP3 player in the car is equipped with QC3.0 fast charging technology, which can quickly charge mobile phones and other devices, saving you time. 3Clear Audio : The car MP3 player supports Bluetooth 5.0, allowing you to enjoy clear music playback through wireless connectivity, bringing a clearer and more stunning audio experience. 4Flexible Use: The car MP3 player can play music stored in the phone or USB drive through Bluetooth connection, and can also transmit music to the car audio through transmission function. 5Intelligent Function: The car MP3 player has a built in microphone and supports hands free calling function, making it more convenient and safe to enjoy driving pleasure.