Hands Free Calling: Simply pair this car transmitter with your phone.You will be able to answer/reject/end calls easily. Hands free function lets you drive safely. Music Player and FM Transmitter: The Car FM Transmitter is able to play the musics on your phone via FM radio. It supports MP3/WMA. With TF card slot and USB port,it is also able to play and transmit music files from TF card or USB drive. Noise Reduction Technology: With integrated 32-bit MCU+DSP technology,this car FM transmitter provides you with clear phone calling and let you enjoy beautiful music. Suitable for a wide range of models The bluetooth fm transmitter compatible with most devices on the market. Play your favorite songs on your car stereo through Bluetooth,TF Card.