Simger In-Car Bluetooth FM Transmitter with Handfree Calling & Music control & USB Charging Port for iPhone Series,Android Smart Cell Phone, MP3 Players (BT-T10) Support hands-free callin, built-in microphone, play and transmit the music from TF card to car stereo via FM radio signal. Noise cancellation by CVC,wind noise suppression, Full duplex technology. Support A2DP, Play mobile music with high quality once connecting by bluetooth. No need to modify anything in car. Auto pairing once turn it on. Support MP3/WMA/FLAC from TF card. Simger car bluetooth come with car charger, output 5V-2.1A, can charge the device in car.