1. Multifunctional: bluetooth FM Transmitter with MP3 player， Hands-free calls， GPS voice navigation， Supporting U-disk play， charging your devices by dual USB ports2. MP3 Player: Listen to music from your mp3 player over your car radio by 3.5mm AUX Input and also support the USB flash disk playing3. Hands-free Call: Built-in microphone and answer phone/hang up phone buttons makes hands-free calls easy while driving4. Dual USB Charging: 2 USB ports with Max 2.1A output，charging your portable devices such iPhones， iPod， tablets， MP3/MP4 player， GPS， DVD， etc.5. Compatible with iPhone 6 6 Plus 5 5S 5C，Samsung Galaxy S6 S5 S4 S3，Note 5 4 3 2， HTC one M8 M9，LG G4 G3， Sony Xperia Z4 Z3 Z3 mini & More Android Smartphone，Tablets，MP3/MP4 PlayersEnjoy MP3 Music and Hands-free CallsYou can greatly enjoy wireless clear stereo music from your phone， MP3 player or U-disk and picking or hanging up phone calls during driving for safety.It's quite easy to switch songs through the side buttons， the obvious answer/hang up buttons and the additional USB ports are definitely convenient and useful.Easy to Set:Simply turn on your car's stereo and tune the frequency as the same as the car MP3 player， Press the play button of the car MP3 player to enjoy your music， get rid of the shackles of cables.Specifications :Adjustable to any angles and fit to all types of Vehicles (9-24V)Digital DisplayBluetooth version:2.0Support 3.5mm Line audio OutputSupport USB flash Disk PlayerSupport MP3， WMA format musicPhone call answer， hang up， reject and other functionsSupport dual USB Charging， the maximum output voltage 5V/2AAutomatic power-off memory functionUSB (Maximum support): 32GBTransmitting Distance: 10-15MPackage List:1 x Bluetooth FM Transmitter1 x User Manual