💡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 | 🔌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 | 🎶3 MUSIC PLAY MODES: Comsoon 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 | 📞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 | 📱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.