Universal Radio Stereo Wired FM Modulator USB Power Port Auxiliary Adapter Universal Wired FM Modulator + 3.5mm to 3.5mm Cable Compatible with Factory and Aftermarket FM Radios Enjoy music from an iPod, Smartphone, Zune, MP3 Player or any other portable audio device with a 3.5mm Headphone Jack. USB Power/Recharge Port Supports Most USB Charging MP3 Players & Smartphones (2) Selectable FM Frequencies: 87.9MHz or 88.3MHz