To make your trip not so boring, you need this card car mp3 player FM transmitter.Made of high quality materials, this car mp3 player FM transmitter is durable and reliable enough for long time using. This card car MP3 player FM transmitter comes with 3 in 1 design. Built-in high-capacity flash memory, also support SD MMC card memory expansion capabilities, external audio input directly. Plug the USB flash drive in this car MP3 player and listen to your favorite music on the go! This car MP3 player FM modulator allows you to listen to the MP3 music saved on your USB flash drive in your car, truck, boat or RV.Enjoy your driving time with this Car MP3 Player FM Transmitter. Do not miss it!