Enegg FM Transmitter Wireless Bluetooth Music Hands-free Calling Wireless MP3 Player Car Kit USB Charger SD LCD for Apple iPhone Samsung Android Cell Phone/Tablet, iPod iPad Double USB charging ports for charging iPod/iPhone, Samsung, iPad, Nokia and other mobile devices(Output 5V/2.1A). Support 12-24V voltage from the car cigarette lighter With compact portable design. Bluetooth hands-free function. LED Display the FM frequency/track Support multipoint connections: can connect two phones at the same time. Support USB disk and SD card, support TF card(Up to 32G) Excellent voice quality, use the DSP (digital signal process) technology to echo cancellation. With 3.5 mm line-in jack, support external audio devices Compatible Modes: IPod/iPhone, Samsung, iPad, Nokia and other mobile devices