Bluetooth FM Transmitter,Simon Birch Hands-free Car Kit Charger MP3 Player for iPhone 6 6s 5s 6 Plus Samsung Galaxy S7 S6 S5 Tablet LG G4 5 HTCSilver Dual USB port charging, multi-car electronic devices at the same time meet the charge. Support MP3, WMA music file formats Handsfree calling is available when your cell phones being connected with this bluetooth car kit.You can playing music by car audio system through this fm transmitter. Free headphone This bluetooth fm transmitter has two usb port,two cell phones mp3 ipod or other devices can be charged at the same time.