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.Mp3/WMA digital music play mode; 3.Record furciton: long time recording with built-in microphone; 4.Storage function by Hard disk with USB; 5.Auto recharge with USB; 6.Capacity:128MB.256MB,512MB; 7.Suitable for any types fo cars, on need to make any changes to original equipments.. 8>.To hug Autobaby and enjoy easeful and comfortable car life in network age, Autobaby is the new lover in network era.