Features: Support MP4 player,support MP3,WMV music formats. Wireless FM transmission,suit to be used in car.Available FM channels:87.5Mhz ... synchronously. Features: Support MP4 player,support MP3,WMV music formats. Wireless FM transmission,suit to be used in car.Available FM channels ... ,7 preset Eqmodes.7 playing methods,rechargeable battey car mp4 player with built-in FM transmitter