Spal 4 in 1 Bluetooth Handfree Speak Call Fm Transmitter Mp3 Player Car Holder Car Charger for Iphone 4s 4gs 4g 3gs 3g Ipod Touch Classic Nano Video Mini ,With Extra Usb Slot to Charge Other Devices Like Ipad Iphone Samsung Blackberry GPS Bluetooth free call,Pairing 2 phones ,Answer /end/reject a call,call switch,Last call redialing, Automatically switch to a Bluetooth State when a call incoming Dsp technology, full duplex, noise and echo supression FM Transmitter Function.Play Music by Car Speaker from your iphones ipods or MP3 Player SD card by USB Slot Charge your iphone ipod at the same time and the extra usb slot available to charge your other devices at the same time two remote controls ,one is steering wheel remote control and the other is infared remote control