... is mainly used for navigating and also has the optional function of video playing, audio playing, Bluetooth hands free, FM, ... call with hands-free (Optional).Entertainment: MP3 and MP4 function can relieve your fatigue.You can use it when driving ... for driving/games fuctionOptional FunctionsTV Function: ISDB-T/ DVB-T, Bluetooth function, FM Radio Transmit, AV-IN Function,Wall AC Charger,wireless back ...