Hands-free calling transmitter for cars with MP3 player support1、Bluetooth Connection: Enjoy clear communication on the go with our Bluetooth transmitter that seamlessly connects to your phone, letting you take calls and stay connected on the move. 2、2 USB Port: Car charger adapter is designed with 2 USB ports, supports charging two USB devices at the same time, such as phone, tablet, camera. 3、Voice Navigation: Bluetooth transmitter allows you to stay on the right path with voice navigation. Get pinpoint accurate voice guidance and stay connected at the same time. 4、Lossless Sound Quality: Car radio adapter produces clear sound quality that rivals any in car system. And with its intuitive interface, you'll be up and running in no time. 5、Plug and Play: Cigarette lighter transmitter is simple to use, just plug it in to the cigarette lighter socket of your vehicle, bringing you more convenience.