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 ignition is off. Battery below 12V charge as soon as possible.High Sound Quality and Hand-free Calling: CVC technology controls noise and storm then creates full-duplex sound quality, provide the high sound quality; Build-in microphone, this wireless bluetooth fm transmitter supports hands-free calling function, answer calls with one click and safely while driving.Universal Compatibility & Memory Function:fits 12V-24V car, Supporting mobile's A2DP function, work with SD, TF card and U disc. Fit for most of the smartphones Samsung iPhone, iPad, tablet and more devices that equipped with bluetooth function. Besides, it will automatically connect to its memorized paired Bluetooth device when power on.