ABLEGRID Bluetooth MP3 Player FM Wireless Transmitter Handsfree USB SD MP3 Player LCD Car Kit&nbsp;Mic for Laptop, Tablet pc, Cell Phone and Mobile Devices A new Bluetooth MP3 Player FM Transmitter Hands-free Car Kit Charger, which support USB driver and Micro SD card and can automatically play and transmit the MP3 files of USB driver and Micro SD card after matched with your radio by the frequency. Its hands-free system can set free your hands during answer the calls and let you safely drive.Built-in microphone and offer your clear talking and wonderful music. Support multipoint connections: can connect two phones at the same time.Support USB disk(max 32g) and Micro SD card(max 32G), support TF card. With 3.5 mm line-in jack, support external audio devices.Double USB charging ports for charging iPod/iPhone, Samsung, iPad, Nokia and other mobile devices(Output 5V/2.1A). Excellent voice quality, use the DSP (digital signal process) technology to echo cancellation.Support 12-24V voltage from the car cigarette lighter.