[Music U Disk Port High Current Charging] ◎ Bluetooth fm transmitter for car supports QC3.0 fast charge。The attached red USB AM TO USB AF adapter can convert the music USB port from the original maximum 5V/1A charging to 5V/2.4A charging。 | 【Answer calls hands feee】◎High performance microphone with Noise Suppression (CVC) technology, grants you crystal clear call. Answering/redialing/dismissing or ending call just simply click a button. | 【Immerse in hifi music】◎Insert the U disk or TF card containing MP3 format files into the corresponding port and enjoy it. If this is not enough, it can also support your playlist without distorting the original signal from MP3, iPhone, Android smartphone and more Bluetooth-enabled devices. | 【Wide compatibility】◎Bluetooth Car FM Transmitter can be paired as a hands-free kit with all Bluetooth enabled devices, such as iPhone, iPad, iPod, Tablet, Samsung, HTC, Sony and other Andriod Smartphones. | 【LED voltmeter display & 7 color lights】◎The car voltage will be displayed when the FM transmitter is inserted into the car cigarette lighter. The last paired phone can be automatically connected due to the memory function. In addition, the colorful led light can be switched by 7 different colors 。