1).Wireless transmission, change audio signal into FM signal and transmits wirelessly to the car speaker and play.No need to change any original equipments of the car and is convenient and economic. 2）Support Mp3 and WMA format; 3）Long time recording function, U disk storage function; 4）Many EQ optional, A-B repeat; 5）USB high-speed transmission, one 揂AA?battery can work for over 7 hours; 6）Suitable to any types of cars, no need to change any original car devices, over 100 songs can be stored; 7）To hug Autobaby and enjoy easeful and comfortable car life in network age.