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12v/24v wireless:1. Read MP3/WMA files from USB flash disk or SD/MMC card, transmit music signal over car FM tuner, then enjoy music via car stereo.2. SD Card Slot & USB Port. 3. Support external audio player (MP3 Player, CD, VCD, etc).4. Draw power from the cigarette lighter in the car (DC12V or 24V power).5. Rotary joint design more convenient to adjust the device position.6. Frequency and music track function.7. 15 FM Channels (87.7 ~ 89.1MHz and 106.7~107.9MHz).8. Unique figure design, excellent sound quality, extreme music experience.9. Wierless remote controll