1.FM transmitter for iPhone 4S & iPod 2.MFI approval 3.CE, FCC ... 4.With car charger 5.Auto scanning MFI Auto Scan FM Transmitter With Car ChargerProduct futures:1. Play your music to ... 1MHz/step4. Memorizes the last frequency 5. Supply power to FM Transmitter using included car charger6. CE,FCC & RoHS approvelCompatible with ... models,iPhone,iPhone 3G,iPhone 3GS. MFI Auto Scan FM Transmitter for iPhone 4S