【The Latest Bluetooth V5.0】Compared with Bluetooth 4.2, Bluetooth 5.0 has: 2x Data Transfer Speed, 4x Transmission Range, 8x Broadcast Massage Capacity, much better audio quality. Enjoy faster data Transfer Speed and much more stable connection between a device and the audio receiver with FM transmitter.【Hands-free Calling】Featuring echo cancellation and CVC noise suppression technology, the Bluetooth FM transmitter can provide you with a smooth and clear calling. Just press the FM''Phone'' button to answer/ hang up/ reject/ redial calls, seamlessly switches between incoming calls and music. your hands can be free for safe driving.【Easy Setting】 Plug this car audio fm transmitter into the cigarette lighter socket, set the Car FM Radio to an empty station (76.0-108.0 MHz) and tune the FM Transmitter to the same frequency. Pair your phone and fm transmitter via Bluetooth, and then enjoy your music.[Voltage Detection] VAfter inserting the Bluetooth Car FM Transmitter into the car socket, the car voltage can be detected and temporarily displayed in the screen to remind you whether you need to replace the car battery. Let you to know your car battery state easily and ensure safe driving