... Vibration Speaker 1)Mini speaker for iPod,Iphone,MP4 2)360degree surround sound 3)FCC,CE,ROHS 4)Print your logo Portable Vibration Speaker ... • AMP Freq Range:180Hz-20kHz• S/N:more than 80DB• Speaker:40Hm,φ40mm• Line input:φ3.5mm• Battery Voltage:3.7V ... ,MP3,MP4,MD,CD,DVD player,Mobile phone,etc • Mini Speaker*1• USB Cable with 3.5mm Audio Jack*1• User ...