Bluetooth transmitter you shall have music wherever you go with this bluetooth fm transmitter connect it wirelessly to an mp3 player or smartphone and listen to your own play lists through the car radio the transmitter has an integrated microphone for hands free phone calls and a flexible gooseneck to let you select the best listening position powered by a 12v cigarette lighter it also has a usb port for audio playback or charging usb devices and a remote control so its easy to operate