Best Wireless Multifunctional Bluetooth Handsfree Car Kit/Adapter FM Transmitter/Calling/Mp3 Player, Dual USB Ports for Cellphones Power/Battery Charge,Blue MP3 Player Wireless FM Transmitter Modulator Car Kit & USB TF LCD Remote Simply paired your phone with the Bluetooth FM Transmitter and its hands-free system can set free your hands during answer the calls and let you safely drive. With 3.5 mm line-in jack, support external audio devices. Wireless transmit phone call from Bluetooth mobile phone to the car FM stereo system Newest version : Hands-free calls, enjoy clear music, GPS voice navigation, charge your device. This is 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.