sound box 1.speaker sensitivity high 2.grinds sand material 3.MP3,CD,PC input speaker 4.KTV speaker sound box,loudspeakerFEATURES:1.speaker sensitivity high2.grinds sand material3.MP3,CD,PC input4.KTV speaker Feature/Function:1. It uses imported unit and strengthen of power output.2. It has outstanding sound quality and perfect safeguard function.3. Application :classroom, conference room, multi- ...