Enjoy Clear Stereo Sound in Two WaysThe Bluetooth FM transmitter supports music playback via USB disk (64GB), Bluetooth. When you use it for hands-free calling, music playback, audio GPS navigation and more, CVC noise canceling technology will give you stereo and crystal sound. It will bring you an amazing audio experience. 2 Ports & QC3. 0 Fast ChargingThe car charger has 2 USB ports, which can charge two devices at the same time. One is the QC3.0 fast charging port. It can charge your phone quite fast, up to 4 times faster than standard chargers. The other is 5V/1.0A. Hands-Free CallingThis bluetooth car transmitter has a built-in microphone, with just one click of a button, you can easily answer, hang up, reject calls or redial the last number. You can use the multi-function button to control calls and music, seamlessly switch between calls and music, making driving safer. Compact and PortableThe FM transmitter car kit is compact in size. It fits perfectly in your cigarette lighter and takes up a little space in your car, but it does magic for you.