... built in, 1G / 2G /4G optional.2) Built-in FM wireless transmitter, transmitting range: 87.5MHz ~ 108.0MHz,total206 frequencies optional ... VCD).6) Draws power from the cigarette lighter in the car: DC12V/24V power.7) Excellent sound quality, extreme music ... control.Can choose the music and frequency directly. Car MP3 Player T88 (car mp3 player with wireless fm transmitter/car mp3 transmitter) (GF-T88)