Wirelessly transmit phone call from Bluetooth mobile phone to the car fm stereo system; Built-in fm transmitter full frequency: 87.5~108MHz With built-in microphone; Supports USB disk and Micro SD card; With 3.5mm line-in jack support external audio devices; Switch to hands-free mode automatically from music playing status when receiving calls; Supports 4 loop modes: Repeat all Random Repeat one Folder; 5EQ for optional: Natural Rock Pop Classic Jazz; USB charging port for charging iPod / iPhone iPad and other mobile device (output: DC 5V / 2.1A); Strong and elegant design with LCD screen display just support number displaying; Flexible metallic hose adapted for any type of autos; With infrared remote control easy operation