BesteyeHigh Performance Digital Wireless Bluetooth Fm Transmitter, in-car Bluetooth Receiver, fm Radio Stereo Adapter, bluetooth car charger with Handsfree Calling and USB Charging Port Up to 2A * Built-in Microphone,you can makes hands-free calls.Enjoy your safety driving. * pairing your phone and FM transmitter by bluetooth, insert device in the socket, switch to FM radio mode, make sure FM transmitter frequency the same as car's FM, then you can enjoy your music what you want * 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. *Dual USB Charging port:Output voltage,DC 5V,2A.You can charge your iphone/Ipad/tablet/when you enjoy driving.Two USB socket support U Disk to play music using your car speaker. *Compact, lightweight and simple design - perfectly portable and unobtrusive.