... , ROHS approval. 4.OEM&ODM 5.High quanity. For ipad&iPhone4 fm transmitterProduct features:Product features:1. Listen to ... . Draws power from iPhone or iPod,no need for batteries7. With charging socket at the bottom,charge ... , Car charger and USB cable.Compatible with:Work for iPad, iPhone 4S,iPhone 4,iPhone 3GS,iPhone 3G,all ... the last frequency when you disconnect it. For ipad&iPhone4 fm transmitter