It can automatically play and transmit the MP3 files of USB Flash Drive and TF Card. First insert Wireless Bluetooth FM Transmitter in car charging port. 1X Bluetooth FM Transmitter. 1X Aux Cable. 4 MODES PLAY MUSIC, HI-FI STEREO SOUND QUALITY – Bluetooth sound processing A2DP, High-performance built-in microphone with Echo Cancellation.
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