VicTec Wireless Bluetooth Car FM Transmitter W 2.1A USB Charger Car Kit with 3.5mm Audio Port and TF Card Slot for Smartphones, Tablets, MP3 - Black Large LCD screen to display the name of English song (with TF card only), voltage of car battery and incoming phone number Transmits audio files from mobile devices to car stereo system via FM radio signal. It can play music files with FLAC, WAV, MP3 and WMA formats on an TF card with a capacity of up to 32GB With memory function and will automatically connect to its memorized paired Bluetooth devices when power on With 5V/2.1A charging port for fast charging and provides your devices fast and effective charging You can answer/hang off/reject/redial calls through hands-free function. Noise and wind will be suppressed by CVC technology to create full duplex sound quality. With 3.5mm audio port supports AUX input/output