Excelvan FM Transmitter 3.5mm Audio w/Car Charger for iPhone 5 5S 5C iPad Air iPad Mini 2 Provides hands-free conversations through your car speakers. (need to connect with 3.5mm audio) USB output charging for Mobile Phones, GPS, and other devices. Full frequency range design effectively avoids interruption. Compatible with virtually any Smart Phone and MP3/ MP4. Perfect audio transmission function.