Car Radio: Upgrade your existing car radio system to a multifunctional digital radio + Bluetooth hands-free Qc 3.0 Fast Charging: The Bluetooth FM transmitter is equipped with 2Usb ports, two fast charging USB ports support Qc3.0 and 5V/2.5A, which can quickly charge two devices at the same time, and the other one is for USB music playback. Calls + Wireless Music Streaming + 64Gb Tf Card Music Playback + USB Car Charger. There's even more station choice in your car, all in crystal clear digital DAB quality. Hands-free calling and car charger: You can make hands-free calls while driving thanks to the built-in microphone of this Bluetooth DAB transmitter, which allows you to conveniently answer, hang up, reject calls or redial the last number. Plus, there are USB ports so you can charge your phone or tablet while driving. Connectivity: It works with your existing car audio system using a simple auxiliary input cable (included) or via an unused FM transmission frequency.