Check the listing for details. Bluetooth Car FM Transmitter MP3 Player Hands free Radio Adapter Kit USB Charger. Color: Black, Condition: New. Listed at 15.97 USD. Perfect Four Play Modes with Color Screen - Bluetooth play, TF Card play, U Disk Play, AUX Play, Noise and wind suppressed by CVC technology to create full duplex sound quality; support MP3/wma/wav/flac, anti- statics design, enjoy the lossless music in your car! More Features: Supports incoming call announcement; fast forward & backward; supports hands-free calls and private calls; built-in over-current protection, over-voltage protection, intelligent temperature control and short circuit protection. Safety Function: Safety when driving is our first concern, so our devices are equipped with a voltmeter. it will detect the car battery constantly. Battery between 14.8V to 13.4V is high when your car is on and moving. Battery between 12.8V to 12.2V is normal when your car is parked and ignit.