?WIDE COMPATIBLITY?FM transmitter can be paired with all Bluetooth enabled devices, it is compatible with iPhone, iPad, iPod, Tablet, Samsung, HTC, Sony and other Android Smartphones. ?HANDS-FREE CALLS?Built-in microphone with echo cancellation and noise suppression (CVC) technology, this Bluetooth FM transmitter provides an amazing hands-free function; Answer/Reject/Hand up/Redial calls all in one multifunction button; Automatically switch to hands-free mode from music playing status when coming calls. ?AMBIENT BLUE RING LIGHT?When power on, the ambient luminous ring light will illuminate blue, making it easy to use in car dark environments, and also brings a cheerful atmosphere; Easy and comfortable to view volume, car voltage and FM frequency displayed on the LED screen. ?3 MUSIC PLAY MODES?This FM transmitter for car can stream clear stereo music freely in 3 ways--A. Bluetooth Connection; B. USB Flash Disk (=32G); C. TF Card (=32G), Supports MP3/WMA/FLAC/WAV/APE format. 2 USB PORTS & SAFE CHARGING?Supports charging 2 devices simultaneously with overcharge protection. One USB port(5V/1A) with music icon can read USB disk, another USB charging port(5V/2.4A) efficiently gets your smart device fully charged. Enjoy in-car stereo streaming and charge smart phones at the same time.