QC3.0 Bluetooth hands-free phone MP3fm transmitter

First-time use 1.Plug the transmitter into the cigarette lighter socket. The product will start up and LCD will display the car battery voltage. 2.Open the car audio system and select an vacant FM radio station. 3.Tune the FM frequency of transmitter same with the car radio. 4.Search the transmitter"T43"via phone bluetooth,there is a voice prompt after paring successfully.   Features  1. bluetooth answer, hang up, reject, redial phone and other functions 2. Support bluetooth stereo music playback 3. Support dot matrix display 4. Support Car Accumulator voltage detection 5. Support TF card to play music(1G-32G) 6. Support MP3/WMA/APE/FLAC/WAV format 7. Support FM full frequency 87.5-108.0MHZ 8. Auto power-off memory function 9. USB 1:5V/1A Charging 10. USB 2: 5V/2.4A charging recognition 11. Support voice prompt of mobile navigation 12. Aux in/out 13. Support Caller ID display 14. Support the activation of mobile phone voice assistant