Handsfree Call Car Charger,Wireless Bluetooth FM Transmitter Radio Receiver,Mp3 Audio Music Stereo Adapter,Dual USB Port Charger Compatible for All Smartphones. It has 2 USB charging port to charge most USB Devices. Input 12V/24V, 1a port with USB reading and charge function; smart 3. 1 A charge port which can intelligently identify Android or iOS devices and charging. Support Bluetooth /USB disk/TF card/ MP3/wma player. With anti-interference performance and CVC technology.