With USB?? SD card slot.</br>Music file format: MP3 file format.</br>Used for motorcycle?? scooter?? motor tricycle?? auto rickshaws.</br>Music broadcast mode: Support SD/MMC card or USB Drive to play music.</br>Main function: MP3 player+ FM radio+Security Alarm system+ Wireless remote.</br></br>Product Description</br></br><b>Rock-Crystal788?? New Style Portable 12V Motor