BT Hands-Free Car Charger 5V LED digital display, Supports FM transmission finction 87.5-108.0MHZ, fixed on air conditoner vent or center console, supports TF card playing music, hands-free answer/hang-up/reject/redial phone, hands-free stereo music play, ambient light display, automatic power off memory function, AUX input function, private answer, SIRI/GOOGLE voice assistant, MP3/WMA/WAV/FLAC format music playback, navigation voice prompts