... battery; 3. Backlight LCD screen; 4. CE, FCC. Direct USB Type Bar MP3 Player (EM646) Features:1. Capacity: 256M,512MB, 1GB, 2GB ... , lock up, battery power display, and FM (optional);7. Battery type: rechargeable lithium polymer battery;8. Battery lifespan: 6 to 8 ... ! Inquire Now, Best Price Will Provide to You! Direct USB Type Bar MP3 Player (EM646)