... Box 2)can switch-in Notebook PC,MP3,MP4,Ipnone etc 3)Build-in FM radio 4)CE,FCC,RoHS ... powered loudspeakers,long time play2.With line in function,can switch-in Notebook PC,MP3,MP4,Ipnone etc..3 ... new technology Class D,Nice acoustic fidelity6.Build-in flash memory,can storage large quantity music and ... data7.Full function All in One port design,All external using single port8. ...