Features:Wirelessly transmit phone call from Bluetooth mobile phone to the Car FM stereo systemBuilt-in FM transmitter， full frequency:87.5-108.0 MHzWith built-in microphoneSupport USB disk and Micro SD card， support TF card ReaderExcellent sound quality with digital signal processing solution for echo cancellationNoise suppression(CVC)With 3.5 mm line-in jack， support external audio devicesSwitch to hands-free mode automatically from music playing status when receiving callsUSB charging port for iPod/iPhone/iPad， For Samsung Nokia and other mobile devices(Output 5V/2.1A)Support 12-24V voltage from the car cigarette lighterBroadcast music stored up by the automobile through car stereo systemFull duplex， digital signal processing technology5 EQ for optional:Natural， rock， pop， classic， JazzBluetooth hands-free functionLED Display the FM frequency/trackSupport A2DP