Detailed Selling Lead Description 1) With FLASH MEMORY built in, 256M / 512M / 1G / 2G optional.. 2).Inner flash, 7-channel FM audio transmitter, LED indication. 3) Automatically plays MP3 / WMA format music in the built-in Flash memory, and transmits to radio. 4) Fashionable and innovative design, you can enjoy Hi-Fi music in the car or boat, No need to change any original equipment and is convenient and economic. 5) Adopted frequency phase lock loop technology and 3D sound coding technology. 6) USB: Standard USB2.0 port, high-speed transmission. 7)Full-function remote controller.