【Bluetooth V5.0】 Stereo digital PLL frequency locked car Bluetooth hands-free car charger MP3 player, using high-performance professional-grade Bluetooth module 5.0+EDR, built-in MP3 decoder chip. | 【U Disk & TF Card】 Able to play music files in U disk and TF card, and transmit to car audio via wireless | 【Switch freely】 If you call from a mobile phone with Bluetooth function, you can automatically switch to the hands-free call state, and automatically switch back to the music playback state after the call is over. | 【Easy to Use】 Transmit the MP3 music in your mobile phone to your car stereo through wireless transmission. No need to modify your car, you can easily enjoy music while driving, and you can use your mobile phone to talk hands-free, for entertainment. | 【Contact us】Our bluetooth FM transmitter is made of high good quality. If you have any other questions about our products, please feel free to contact us.