1. Support format: MP32. Memory: 1GB-16GB3. S/N ratio:≥85dB4. Output frequency: 20Hz-20 KHz 5. Batteries:built in Rechargeable Li-ion battery 6. Interface:USB 2.07. Operating system:windows 98/2000/XP8. Working Temperature:-10~45 degree 9. Play/Pause press: easy to work10. Replay press11. The press of VOL control (+/-)12. Option press: previous/next 13. Loudspeaker: power 2×10MW   

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