1.MINI speaker with USB ,SD CARD ,FM 2.power amplify: ... property rights.•High-gloss white plastic shell, Paper tube speaker cavity , effectively reducing the cabinet resonant noise.•MP3/ ... use of power for more than 90%.•2-inch HiFi stereo speakers, Clear treble, alto sweet, strong bass ... status indicator, the use of more convenient.•With a standard Mini USB charging port, supports MP3 / MP4 / mobile ...