Bluetooth FM Transmitter, YOKKAO Wirelss Modulator Radio Adapter Handsfree Car Kit MP3 Player with LED Display and Remote Control Support USB Disk/ SD Card 3.5mm Aux-in BUILT-IN FM TRANSMITTER - Wireless transmit phone call from Bluetooth mobile phone to the car FM stereo system. With FM transmitter, full frequency: 87.5-108.0MHZ. Plug the FM transmitter into your vehicle's cigarette lighter or power port, enjoy your music time. REMOTE CONTROL TECHNOLOGY - With the multi-functional infrared remote control technology, remote control helps you choose your favorite songs even you are in a rear seat. Enjoy your favorite music whenever and wherever possible in the car. MULTIPLE WAYS TO INPUT - It support USB disk and Micro SD card. With 3.5mm line-in jack, also support external audio devices, allows you to stream music to your stereo FM.Support MP3 and WMA format file Works well with iPhone, Android, other leading mobile phones. MULTI-FUNCTIONAL - This bluetooth FM transmitter can not only be used to play music. With bulit-in microphone, it also provides you with an amazing hands free function. You can answer and hang up the phone. With two USB ports, you can charge your devices at the same time(Note: The one on adapter can only charge your device, the one on MP3 player can charge your device and supports USB disk play) ATTENTION - 1. Please don't choose frequency that has local radio station to avoid interference. 2. It might be unable to read your micro SD card if there are too many things in your card. 3. If the end of transmitter was spread out when use it, pls reinstall it according to order, it still can work as before. With infrared remote control, easy operation. Support 12-24V voltage from the car cigarette light. 5 EQ for optional: Natural, Rock, Pop, Classic, Jazz. With 3.5mm line-in jack, support external audio devices. With built-in microphone and automatically calling-number system. Built-in FM transmitter, supports USB disk and SD card,A2DP function. Dual USB charging port for charging MP3, tablet and other mobile device. Strong and elegant design with LCD screen display, just support number displaying. Switch to Hands-free mode automatically from music playing status when receiving calls When using line-in function, pls stop playback of USB or memory card ,and all functions will be controlled by the external device.