Car MP3 Adapter Bluetooth FM Transmitter Dual USB Port Wireless Bluetooth Handsfree Calling MP3 Player Multifunctional Design 5 in 1:Wireless Bluetooth in-car Multifunction FM Transmitter enables you to do Hands-free calls, enjoy clear music, GPS voice navigation, charge your device. Better for empty channel. Fast and Safe Charge: 5V/2.5A USB charger will automatically adjust the output power to different smart phone. Used for mobile phone quick charger without damage to the battery Hands-free Calling: Simply paired your phone with the Bluetooth Adapter and its hands-free system can liberate your hands during answer the calls and let you drive safely Dual USB Charging port:Output voltage,DC 5V,2.1A.You can charge your iphone/Ipad/tablet/and other smartphone when you enjoy your driving.2 USB socket support U Disk to play music in your car speaker.Compatible with iPhone 6 6+iPad Air, iPad Mini 2, Samsung Galaxy S4/3, Samsung Galaxy Note 3/2, Nexus 5/4, HTC One, Blackberry and Android, Blackberry & Windows Smartphone. Wide Compatibility:Compatible with iPhone 6 6+iPad Air, iPad Mini 2, Samsung Galaxy S4/3, Samsung Galaxy Note 3/2, Nexus 5/4, HTC One, Blackberry and Android, Blackberry & Windows Smartphone.