... with Entertainment,Microphone, Amplifier, Loudspeaker,Music play and FM radioSupporting USB for music ( mp3 format ) ( USB 2.0/1.1 )With ... Battery working time keep working in 8-12 hourse Function Mp3, FM radio, Amplifier, loudspeaker, microphone, reverberation Digital mini professional ... box . 2.Music amplifier :When connect the computer or MP3 with the cable , the music volume could amplified by ...