1.USB laptop speaker 2.Audio speaker 3.Applicable to USB,SD/MMC ... ,PSP,MP3,MP4 to listen to music-Have audio interface,can do computer speakers -Power supply:Built ... delicate your MP3, MP4, CD or notebook computer audio etc. For better efficacy. Reference coefficientOutput powerFrequency responseSNRCharging ... oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); Two speakers USB laptop audio speaker