F28 Portable FM Transmitter 3.5mm Audio with Car Charger compatible with iPhone 5 iPad 4 iPod Touch 5 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. 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.